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\title{Experimental Research Agency of Fouling on Heat Rating of the Tubular Ridge Convector}
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             \author[1]{Sukhotski  Albert}

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\date{\small \em Received: 12 April 2021 Accepted: 1 May 2021 Published: 15 May 2021}

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\begin{abstract}
        


The experimental research of intensity of a thermal stream and distribution of temperatures on ribbed pure and low-purity surface of the tubular ridge convector with spiral aluminium ribs is spent at air free convection. Researches were spent by a method of full thermal model testing at specially developed experimental stand, and ring uniform pollution ribbed tubes was created by dense winding between ribs of a linen cord or wrapping of tube by an aluminium foil.It is revealed that at a free convection in tubes with a close arrangement of ribs of pollution of intercostal space at the basis ????????? does not lead to essential decrease in a heat rating (less than 10 %), and the decline to give heat properties of a tube occurs only at pollution of cops ribbed (on 20,5 %). The temperature on altitude of a lateral surface of a rib decreases slightly (less than 2 %), and on a rib cop in relation to the basis -for 6-9 %. Hence, at maintenance of ridge convectors of systems of heating their frequent and careful clearing of pollution is not obligatory.

\end{abstract}


\keywords{bimetallic ribbed tube, convector, pollution, heat rating at air free convection.}

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\section[{Experimental Research Agency of Fouling on Heat Rating of the Tubular Ridge Convector}]{Experimental Research Agency of Fouling on Heat Rating of the Tubular Ridge Convector}\par
????????????????? ???????????? ??????? ???????? ??????????? ?? ???????? ???????? ?????????? ?????????? ?????????? 
\section[{Sukhotski Albert}]{Sukhotski Albert}\par
Abstract-The experimental research of intensity of a thermal stream and distribution of temperatures on ribbed pure and low-purity surface of the tubular ridge convector with spiral aluminium ribs is spent at air free convection. Researches were spent by a method of full thermal model testing at specially developed experimental stand, and ring uniform pollution ribbed tubes was created by dense winding between ribs of a linen cord or wrapping of tube by an aluminium foil.\par
It is revealed that at a free convection in tubes with a close arrangement of ribs of pollution of intercostal space at the basis ????????? does not lead to essential decrease in a heat rating (less than 10 \%), and the decline to give heat properties of a tube occurs only at pollution of cops ribbed (on 20,5 \%). The temperature on altitude of a lateral surface of a rib decreases slightly (less than 2 \%), and on a rib cop in relation to the basis -for 6-9 \%. Hence, at maintenance of ridge convectors of systems of heating their frequent and careful clearing of pollution is not obligatory.\par
Keywords: bimetallic ribbed tube, convector, pollution, heat rating at air free convection.   ???????? ???????? ????? q, ??/?, ?? 1 ? ???????? ????? ?????????? ?????????? ?? ????? ? ??????? ?????????? ? ??????????, ????????????? ?? ?????????   (t ? -t 0 )/q,?? 0 ?/?? h,?? W=10,3 ??; 
\section[{???????????}]{???????????}( ) ï / , q W Q l = ? ??? Q ? ?1,0 1,5 2,0 R ? , (? 2? ? 0 )/?? q/?t ??? , ??/(??? 0 ) ?? ???. 4 ???????????? ??????????? ?????????????? ???????? ??????????? (t ? -t 0 ) / q ?? ??????\par
???. 4: ??????????? ?????????????? ???????? ??????????? (t ? -t 0 ) / q ?? ?????? ????? h ??? ?????? (h ? = 0), ???????????? ??????? ?????? ? ? ??????????? ???????? ? ?????????? ????? ? ??????? ??????????? h ? ? ???????? ????????? W: ! ? h ? = 0 ??, , ? h ? = 3,3 ??, 7 ? h ? = 6,3 ??, ? ? h ? = 8,7 ??, ? ? h ? = 11,4 ??, ? ? h ? = 16,1 ??; ! ? W = 10,3 ??, ! ? W = 19,3 ??, ! ? W = 26,0 ??, ? ? W = 51,0 ??, ! ? W =\begin{figure}[htbp]
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\caption{\label{fig_1}}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{} \par 
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  {\small\itshape [Note: Author: ?ssistant professor Sukhotski A. B., Ph. D. student ?. S. Danil'chik, Belarussian state technological university. e-mail: alk2905@mail.ru I.B]} 
\caption{\label{tab_0}??????????? ???????????? ??????? ??? ????????? ????????? ???????. ???????????? ??????????? ??????? ??????? ????????? ????????????? ?? ?????????? ????????????? ????????????????? ??????, ? ????????? ??????????? ??????????? ?????????? ????? ??????????? ????? ??????? ??????? ????? ??????? ???????? ????? ??? ???????????? ????? ??????????? ???????.}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{} \par 
\begin{longtable}{P{0.85\textwidth}}
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\multicolumn{6}{l}{??????? ???????????? ????????????? ??????????}\tabcellsep ?????, ????????? ???????????? ???? ????? ??\\
\multicolumn{6}{l}{??????????????? ????? ? ????????? ???????????}\tabcellsep ??????? ?????????? 45º. ????????? ????\\
\multicolumn{6}{l}{???????????? [12?15] ??? ??????????? ???????}\tabcellsep ???????? ? ????????? ????? ????? ??????????\\
\multicolumn{6}{l}{?????, ?????????????????? ???????. ???????, ??????, ???? ?????? ? ???????????? ????????????? ????????? ?????? ? ?? ???????????? ????????????????? ????????????? ?????????? ?? ?????????? ?????? ? ???????????? ??????????? ??????????????? ????? ??? ????????? ????????? ???????.}\tabcellsep ????? ?? ???????? ????? ?? ???????? ?????????? ?????, ??????, ??? ?????? ???????? ????? ???????????? ???? ??????????. ????? ?? ??????????? ?????, ???????????? ? ?????? ?????, ???????????? ?????? ????-?????????????? ????????? 8 (??????? ??????? 0,2 ??) ? ????? 3,65 ?? ?? ????????? ?? ?????? 3,65 ?? ? ????????? ?????????? ??????????? ?? ????????\\
\tabcellsep \tabcellsep II.\tabcellsep \multicolumn{3}{l}{???????? ?????}\tabcellsep ????? (???. 1, ??????? I). ??????????????\\
\multicolumn{6}{l}{???????? ??????????????? ????????? ????? ?? ??????????? ???????????? ???????? ????????? ???????. ???????? ????????? ???????? -??????????? ????? ?Ð?"1?, ???????? ??????? ????? -}\tabcellsep ????????? ???? ????????????? ? ????????? 0,1°?. ???????? ??????? ?????????? ????? ???????? ??????????????? ???????? 9 ???????? ????????? d\\
\multicolumn{6}{l}{???????????? ????? ??10. Ð?"?????? ??????? ?????}\\
\multicolumn{2}{l}{d ? = 25 ??,}\tabcellsep \multicolumn{2}{l}{???????}\tabcellsep \multicolumn{2}{l}{??????}\tabcellsep ? = 2 ??.\\
\tabcellsep \multicolumn{5}{l}{???????????? ??????????? ??????? ???????}\\
\multicolumn{2}{l}{?????????}\tabcellsep \multicolumn{2}{l}{?????????????}\tabcellsep \tabcellsep ??\tabcellsep ??????????\\
\multicolumn{6}{l}{????????????? ? [16] ????????????????? ?????? ???}\\
\multicolumn{6}{l}{???????????? ????????-????????????? ???????????. ?}\\
\multicolumn{6}{l}{?????? ????????? ?????? ???????? 0,8×0,8×1 ?}\\
\multicolumn{6}{l}{??????????? ??????????? ?????????? ?????, ???????}\\
\multicolumn{6}{l}{???????? ???????????? ? ?????????????? ??????????}\\
\multicolumn{2}{l}{?????????.}\tabcellsep \tabcellsep \tabcellsep \\
\tabcellsep \multicolumn{2}{l}{???????????}\tabcellsep \multicolumn{2}{l}{???????}\tabcellsep ?????-???????????\\
\multicolumn{6}{l}{???????????? ?? ???. 1. ?????? ???????????????}\\
\multicolumn{6}{l}{????????? ????? 1, ????????? ????, ??????????}\\
\multicolumn{6}{l}{????????? ?????????????????? (???) 2 ?? ??????????}\\
\multicolumn{6}{l}{???????????: ??????? ? 12,5 ??, ????? 320 ??,}\\
\multicolumn{2}{l}{????????}\tabcellsep 320 ??.\tabcellsep \multicolumn{2}{l}{??????}\tabcellsep ????????\tabcellsep ????,\\
\multicolumn{6}{l}{???????????? ?? ???????????? ???? ?, ?????????}\\
\multicolumn{6}{l}{??????? 3 ?? ????????? ? ??????? ?????????}\\
\multicolumn{6}{l}{?????????????? ? ??????????? (??????????????????}\\
\multicolumn{6}{l}{???????? ????? ???). ? ??????? ?????????????}\\
??????\tabcellsep 4\tabcellsep \multicolumn{4}{l}{??????????????}\tabcellsep ???????????\\
\multicolumn{6}{l}{???????????? ???? ? ?????. ? ? ????? ??????????}\\
\multicolumn{6}{l}{?????????? ???????????? ????? ??????? ?}\\
\multicolumn{6}{l}{???????????? ???????? ????????? ????? ?????}\\
\multicolumn{6}{l}{????? ? ???????? ??????? ?????, ?????????}\\
\multicolumn{6}{l}{????????? ????? 5 ?????????? ???????? 0,16?0,32}\\
??.\tabcellsep \multicolumn{2}{l}{?????}\tabcellsep ??????\tabcellsep \tabcellsep ?????????????????\\
\multicolumn{6}{l}{??????????????????? ??????????? ???????? 6.}\\
\tabcellsep \multicolumn{5}{l}{Ð?"?? ????????? ??????? ???????????}\\
\multicolumn{6}{l}{??????????? ??????????? ? ????????? ????? t ???}\\
\multicolumn{3}{l}{??????????????}\tabcellsep ???????\tabcellsep \tabcellsep ????\tabcellsep ????-\end{longtable} \par
 
\caption{\label{tab_2}??? ???????????? ????????? ??????????? ?????? ????????? ?? ??????????? ?? ?????? ? ?????????? ??????? ?? ???????????.}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{} \par 
\begin{longtable}{P{0.41851360318513603\textwidth}P{0.028765759787657597\textwidth}P{0.016357000663570008\textwidth}P{0.015228931652289317\textwidth}P{0.0011280690112806901\textwidth}P{0.272992700729927\textwidth}P{0.04850696748506968\textwidth}P{0.022561380225613804\textwidth}P{0.021997345719973457\textwidth}P{0.003948241539482415\textwidth}}
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ?????????\tabcellsep ????????????\tabcellsep ???????\tabcellsep ?????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ?????????? ?????? ??? ??????????? ??????? ?????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ?????????.\tabcellsep ???\tabcellsep ????????\tabcellsep ????????????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ???????????? ??????????? ???????? ????????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ???????? ????????? ?? 55\%.\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ???\tabcellsep ?????????????\tabcellsep ????????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ?????????????? ????? ????????? ?????????????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ???????? ???????? ?????????? ????? ? ????????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ????????? ??????? ????? ????????? ??????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ???????? ????????? d = 56 ?? (?? ???. 3\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ????????????\tabcellsep ?\tabcellsep ????\tabcellsep ??????????\tabcellsep ?????),\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ???????????? ?? [17]. ??? ?????, ????????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ???????? ?????? ?????????? ????? ? ???????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ?????\tabcellsep ???????????,\tabcellsep ???\tabcellsep ????????????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ????????????? ?? ??????????? ?????? ????? ?\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ???????? ?????.\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 0 -???????\\
\multicolumn{6}{l}{?????????? ??????????? ? ????????? ?????????}\\
\multicolumn{6}{l}{??? ???????????? ?????????? ?????. ???}\\
\multicolumn{2}{l}{??????????}\tabcellsep ?\tabcellsep \multicolumn{3}{l}{???????????}\tabcellsep ????????????\\
\multicolumn{6}{l}{???????????? ??????? h ? = h = 14,6 ??, ?}\\
\multicolumn{2}{l}{???????????}\tabcellsep \multicolumn{4}{l}{????????????????}\tabcellsep ???????\tabcellsep ? ?\\
\multicolumn{2}{l}{???????????}\tabcellsep ?\tabcellsep \multicolumn{3}{l}{???????????}\tabcellsep ??\tabcellsep ???????\\
\multicolumn{6}{l}{??????????? ?? ??????????? ?????.}\\
\tabcellsep \multicolumn{5}{l}{??? ?????, ??? ?????? ??????????? ??????}\\
\multicolumn{6}{l}{?????? ????? (h ? < h = 14,6 ??), ????????}\\
\multicolumn{6}{l}{???????? ????? ??????????? ?????????????}\\
\multicolumn{6}{l}{(????? 10\%). ??? ?????? ???????? ?????????}\\
?????\tabcellsep \multicolumn{3}{l}{???????????}\tabcellsep ??\tabcellsep ????????\tabcellsep ?????\\
\multicolumn{6}{l}{(h ? = 16,1 ??) ???????? ???????? ???????????}\\
\multicolumn{6}{l}{?? 20,5\%. ??-????????, ??? ??????????? ???, ???}\\
\multicolumn{6}{l}{??? ???????????? ????????? ? ?????? ? ??????}\\
\multicolumn{2}{l}{?????????????}\tabcellsep \tabcellsep \multicolumn{2}{l}{?????}\tabcellsep ?\tabcellsep ???????????\\
\multicolumn{6}{l}{???????????? ? ????????? ????? ?????? ????????}\\
\multicolumn{2}{l}{???????????}\tabcellsep \multicolumn{3}{l}{???????????}\tabcellsep ?\tabcellsep ????????\\
\multicolumn{6}{l}{???????????? ??????????, ? ???????? ?????}\\
\multicolumn{6}{l}{????????? ?????? ?????????????? ? ????????}\\
\multicolumn{6}{l}{?????????. ??????? ??????????? ????????????}\\
\multicolumn{6}{l}{???????????? ? ????????? ????????? ?? ???????? ?}\\
\multicolumn{6}{l}{????????????? ???????? ???????? ????????, ?}\end{longtable} \par
 
\caption{\label{tab_3}}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{} \par 
\begin{longtable}{P{0.0884517766497462\textwidth}P{0.0798223350253807\textwidth}P{0.0021573604060913703\textwidth}P{0.08413705583756345\textwidth}P{0.0043147208121827405\textwidth}P{0.010786802030456852\textwidth}P{0.4271573604060913\textwidth}P{0.0021573604060913703\textwidth}P{0.023730964467005077\textwidth}P{0.0021573604060913703\textwidth}P{0.11434010152284263\textwidth}P{0.010786802030456852\textwidth}}
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{6}{l}{(???. 1, ??????? I). ?????????? ?????? ?? ???????}\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{6}{l}{???????? ??????? ??????? ?????? ? ????????????}\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{2}{l}{????????}\tabcellsep ??????????\tabcellsep \tabcellsep ???????????\tabcellsep (????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{6}{l}{?????????? ??????? ??????????? t ? ????????????}\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{5}{l}{??????????? ????????? ????????????).}\\
\multicolumn{2}{l}{(t ? -t 0 )/q, (? 0 ?)/??}\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \\
0,55\tabcellsep \multicolumn{2}{l}{h ? =0 ??; h ? =6,3 ??;}\tabcellsep h ? =3,3 ??; h ? =8,7 ??;\tabcellsep \tabcellsep \tabcellsep 0,9\tabcellsep \tabcellsep \tabcellsep \tabcellsep W=19,3 ??;\\
0,50\tabcellsep \multicolumn{2}{l}{h ? =11,4 ??;}\tabcellsep h ? =16,1 ??.\tabcellsep \tabcellsep \tabcellsep 0,8\tabcellsep \tabcellsep \tabcellsep \tabcellsep W=26,0 ??;\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep W=51,0 ??;\\
0,45\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 0,7\tabcellsep \tabcellsep \tabcellsep \tabcellsep \\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep W=77,5 ??;\\
0,40\tabcellsep 0\tabcellsep 4\tabcellsep 8\tabcellsep 12\tabcellsep h, ??\tabcellsep 0,6\tabcellsep 0\tabcellsep 4\tabcellsep 8\tabcellsep 12\end{longtable} \par
 
\caption{\label{tab_4}}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{} \par 
\begin{longtable}{P{0.555873976504094\textwidth}P{0.004841580633677465\textwidth}P{0.004841580633677465\textwidth}P{0.0009077963688145248\textwidth}P{0.013919544321822713\textwidth}P{0.257814168743325\textwidth}P{0.003933784264862941\textwidth}P{0.003933784264862941\textwidth}P{0.003933784264862941\textwidth}}
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 12. ??????? ?.?., ?????? ?.?., ???????? ?.Ð?".,\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ????????? ?.?., ????????? ?.?. ???????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ???????? ??????????? ?? ?????????????\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep ?????????????\tabcellsep ?????????\tabcellsep ??????????\\
\multicolumn{5}{l}{?????????? ????????? ????????????????? ??????-?????? ????????????? ????????? ?????? ? ????????????? ?????????? ?? ?????????? ?????? ? ???????????? ??????????? ??????? ????? ??? ????????? ????????? ???????. ??? ??????????? ?????????? ??????????? ?????? ? ????????? ????? ???????? ???????? ????????????? ????? ??????????? ????? ??? ?? 10\%. ?????????? ??????????? ???????????? ???????????? ??????????? ???????? ????????? ???????? ???????? ????? ??? ? ??? ????. ?????????????, ??? ???????????? ????????? ????????? ??????????? ?? ??????????? ?? ?????? ?}\tabcellsep ?????????? / 13. Ð?"????????????????? ????????????? ???????? ???? ????????? ???? ????????? ?????? ? ???????? ???????????? ??????????? ??????? ?????????????????? ??????????????? / 14. ???????? ?.?. ????????????? ???????\\
\multicolumn{5}{l}{?????????? ??????? ?? ???????? ???????????}\tabcellsep ?????????\tabcellsep ????\tabcellsep ???\tabcellsep ?????????????\\
\multicolumn{2}{l}{??????? ???????????.}\tabcellsep \tabcellsep \tabcellsep \tabcellsep ???????????????? ??????????? ????????????\\
\multicolumn{5}{l}{?????????? 1. ??????? ?. ?., ????? ?. ?. ?????????. ?.: ???, 2008. 2. ?????? ?. ???????????? ???????: ??????? ? ?????????. ?.: ?????????? ??????????, 2006. 3. ??????, ?. ?. ???????? ? ???????????????? ??????? ?????????? ??????????????? ?????????? ?????????? / ?. ?. ??????, ?. ????????. ???.: ???????????????, 1992. 4. ?????? ? ???????? ?????????? ???????????: ??????? ? ?????? / ?. ?. Ð?"???????? [? ??.]. ?.: ??????????????, 1982. 5. Bott, T. R. Fouling of Heat Exchangers / T. R. Bott.}\tabcellsep ???????????? // ???????? ??????? ? ?????? ???????????? ????????????? ??????????????? ????????? ???? ????????? ?????????? ?????????? ? ????????????? ??????? ???????????? // ??????????. ???????? ?????? ??????? ????????? ? ?????????????? ??????????? ??Ð?". 2017. ?. 60. ? 3. ?. 237-255. 16. ??????? Ð?". ?. ????????????????? ????? ??? ???????????? ???????? ? ???????????????? ????????? ????????-????????????? ??????????? ??????????????? ???? ? ?????? /\\
\multicolumn{4}{l}{Amsterdam: Elsevier, 1995.}\tabcellsep \\
\multicolumn{5}{l}{6. Müller-Steinhagen, H. Heat Exchanger Fouling.}\\
\multicolumn{5}{l}{Mitigation and Cleaning Technologies / H. Müller-}\\
\multicolumn{5}{l}{Steinhagen. Essen: PUBLICO Publications, 2000.}\\
7. ??????\tabcellsep ???????\tabcellsep \multicolumn{2}{l}{???????}\tabcellsep ?????????????\\
\multicolumn{5}{l}{????????? ?????????? ??????????/ ?. ?.}\\
\multicolumn{5}{l}{?????? [? ??.] // ?????????? ???????. 2015. No}\\
4. ?. 7-13.\tabcellsep \tabcellsep \tabcellsep \tabcellsep \\
8. ??????\tabcellsep \multicolumn{2}{l}{???????}\tabcellsep ?\tabcellsep ??????????????\\
\multicolumn{5}{l}{??????????????? ?????????? ??????????:}\\
\multicolumn{5}{l}{?????????? / ??? ???. ???. ?.?.???????,}\\
\multicolumn{5}{l}{?.?.??????????. ???.: ?????, 1996.}\\
\multicolumn{5}{l}{9. ????, Ð?". ???????? ??????????? ??????????? /}\\
\multicolumn{5}{l}{Ð?". ????, ?. ?????. ?.: ???????, 1977.}\\
\multicolumn{5}{l}{10. ???????????? ?. ?. ???????????????? ???}\\
\multicolumn{2}{l}{????????????}\tabcellsep \multicolumn{2}{l}{?????????}\tabcellsep ??????????\\
\multicolumn{5}{l}{?????????? ?? ????????????? ????????????.}\\
\multicolumn{5}{l}{??????????? ????. ???????????. ???, 2002.}\\
11. ????????\tabcellsep ?.\tabcellsep \tabcellsep ?.\tabcellsep ?????????\\
\multicolumn{5}{l}{??????????????????? ?????? ?????????? ????}\\
\multicolumn{5}{l}{?? ????????????? ????????. ??????????? ????.}\\
\multicolumn{3}{l}{???????????. ???, 2010.}\tabcellsep \tabcellsep \end{longtable} \par
 
\caption{\label{tab_5}}\end{figure}
 		 		\backmatter  			  				\begin{bibitemlist}{1}

\end{bibitemlist}
 			 		 	 
\end{document}
