@incollection{,
	
					
					
					AA5625E33F6E592935D5BA2F25E273F0
				,
	author={{H. M.Akram} and {University of Punjab. Pakistan}},
	journal={{Global Journal of Researches in Engineering}},
	journal={{GJRE}}2249-45960975-586110.34257/gjre,
	address={Cambridge, United States},
	publisher={Global Journals Organisation}14217
}

@book{b0,
	
	
		,
	title={{Vacuum Mechatronics, Ch.-2, P-11}}
		,
	author={{
			GBeni
		}}
		
			,
	year={1990}
			,
	publisher={Artech House}
			,
	address={Boston, London}
		
	

}

@book{b1,
	
	
		,
	title={{}}
		,
	author={{
			JeffreyPLuby
		}}
		
			,
	publisher={Application Engineer -BOC Edwards Inc}
		
	

}

@book{b2,
	
	
		,
	title={{Vacuum Technology and Standardization -An Update}}
		,
	author={{
			HMAkram
		} and {
			HRashid
		}}
		
		
			,
	year={2011}
			,
	publisher={World Scientific}
			998
			
		
	

}

@incollection{b3,
	
	
		,
	title={{}}
	
	
		,
	journal={{J. Vac. Sci. Technol. A}}
		
			7
			3
			,
	year={May/Jun 1989}
		
	

}

@book{b4,
	
	
		,
	title={{}}
		,
	author={{
			Knf Neuberger
		} and {
			Inc
		}}
		
		
			,
	year={2009}
			,
	address={Trenton, New Jersey}
		
	
	,
	note={Technical Library}

}

@incollection{b5,
	
	
		,
	title={{}}
	
	
		,
	journal={{MM}}
		,
	editor={Waukesha Cherry-Burrell}
		
			604
			,
	year={November (2002}
		
	

}

@book{b6,
	
	
		,
	title={{A journal of practical and useful vacuum technology by Phil Danielson, vacuum lab}}
		
			
		
	

}