@incollection{,
	
					
					
					EC5944AD9329550317C7876C57A01FB5
				,
	author={{H. M.Akram} and {Quaid-I-Azam University}},
	journal={{Global Journal of Researches in Engineering}},
	journal={{GJRE}}2249-45960975-586110.34257/gjre,
	address={Cambridge, United States},
	publisher={Global Journals Organisation}1441520
}

@book{b0,
	
	
		,
	title={{Handbook of Vacuum Technology}}
		,
	author={{
			KarlJousten
		}}
		
			,
	year={2008}
			,
	publisher={WILEY-VCH Verlag GmbH & Co. KGaA}
			,
	address={Weinheim}
		
	

}

@book{b1,
	
	
		,
	title={{Valves" The Engineering Handbook}}
		,
	author={{
			JPTullis
		}}
		
			,
	year={2000}
			,
	publisher={CRC Press LLC}
			,
	address={Ed. Richard C. Dorf Boca Raton}
		
	

}

@book{b2,
	
	
		,
	title={{Vacuum Sealing Techniques}}
		,
	author={{
			ARoth
		}}
		
			,
	year={1994}
			,
	publisher={AIP Press}
		
	

}

@incollection{b3,
	
	
		,
	title={{Selection criterion of gauges for vacuum measurements of systems with diverse ranges}}
		,
	author={{
			HMAkram
		} and {
			AFasih
		}}
		
	
	
		,
	journal={{Physics Procedia}}
		
			32
			
			,
	year={2012}
		
	

}

@book{b4,
	
	
		,
	title={{Process Vacuum System Design and Operation}}
		,
	author={{
			JLRyans
		} and {
			Roper
		}}
		
		
			,
	year={1986}
			,
	publisher={Mc graw-Hill Book Co}
		
	

}

@book{b5,
	
	
		,
	title={{Vacuum Physics and Techniques}}
		,
	author={{
			TADelchar
		}}
		
			,
	year={1993}
			,
	publisher={St Edmundsbury Press}
			,
	address={UK}
		
	

}

@incollection{b6,
	
	
		,
	title={{Valve Types Selection}}
		,
	author={{
			DanielKatzman
		}}
	
	
		,
	journal={{September}}
		
			5
			,
	year={2007}
		
	

}

@book{b7,
	
	
		,
	title={{Basic Vacuum Practice}}
		
			,
	year={1989}
			,
	publisher={Vartan Associates, Inc., California}
		
	

}

@book{b8,
	
	
		,
	title={{A User's Guide to Vacuum Technology}}
		,
	author={{
			FJohn
		} and {
			O' Hanlon
		}}
		
		
			,
	year={1989}
			,
	publisher={WILEY}
		
	

}