5API standard 610 11th edition.Centrifugal Pumps for Petroleum,Petrochemical and Natural Gas Industries[S].American Petroleum Institute,2010.
6API standard 682 3rd edition.Pumps-Shaft sealing systems for centrifugal and rotary pumps[S].American Petroleum Institute,2004.
7American Petroleum Institute. Centrifugal pumps for petroleum, petrochemical and natural gas industries [ S]. API Standard 610 Tenth Edition, June 2004:13 -15,2 -3.
8American Petroleum Institute. Pumps - Shaft sealing systems for centrifugal and rotary pumps [ S ]. API Standard 682 Third Edition, September 2004:39.