improved provision for reduction of wear of a valve seat gaskets of sphere having seats movable in both directions.

• 1. 一种球阀阀座及应用该球阀阀座的上装式球阀 [P] . 中国专利： CN204226720U . 2015.03.25
• 2. 一种上装球阀的阀座及安装有该阀座的球阀 [P] . 中国专利： CN104141805B . 2017.04.26
• 3. improved provision for reduction of wear of a valve seat gaskets of sphere having seats movable in both directions. [P] . IT208973Z2 . 1988-08-29

  机译： 改进了减少球阀座垫圈磨损的措施，该球阀的阀座可以在两个方向上移动。

• 4. IMPROVED ARRANGEMENT FOR REDUCTION OF WEAR OF THE SEAT GASKETS OF A 2-DIRECTIONAL MOVING-SEAT BALL VALVE [P] . 英国专利： GB2188710B . 1990-02-28

  机译： 减少二维方向移动阀球阀座垫圈磨损的改进布置

• 5. improved ball valve for control of fluids with assicurante sealing device in case of fire and of seats held piston movable in two directions. [P] . IT208972Z2 . 1988-08-29

  机译： 改进的球阀，带有辅助密封装置，用于在发生火灾时控制流体，以及固定在两个方向上可移动的活塞座。

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• 2. THE COMBUSTION CHARACTERISTICS OF A MOVABLE LINEAR FIRE SEAT IN MINE FIRES [J] . 王德明, 王省身 煤炭学报：英文版 . 1996,第001期
• 3. Rationality of Reincorporating the Reserved Seat Provision in the Constitution of The People’s Republic of Bangladesh [J] . Tasmiah Nuhiya Ahmed 心理学研究：英文版 . 2019,第003期
• 4. Development of Matrix Reinforced Valve Seat Materials with Improved Adhesive Wear Resistance [C] . Yoshida Yusaku, Yoneda Takanori, Ueda Yoshihisa, Chinese Society for Metals;World Congress on Powder Metallurgy;China Powder Metallurgy Alliance . 2018
• 5. New generation valves and seats for reciprocating well servicing pumps. [D] . Wago, Toshimichi. 2008
• 6. The Economic Benefits of Child Safety Seat Misuse Reduction Programs and Design Improvements for Children in Rear Seats [O] . E. Zaloshnja, T.R. Miller 2007
• 7. Reduction of the flow forces in a small hydraulic seat valve as alternative approach to improve the valve characteristics [O] . Herakovič, Niko, Šimic, Marko 2016

• 1. Sliding Wear Study on the Valve-Seat Insert Contact [J] . Edgar E. Vera-Cardenas ,Roger Lewis ,Tom Slatter . 应用科学（英文） . 2017,第2期
• 2. 管线球阀的自泄式N座与双活塞效应阀座 [C] . 税丽 . 2010第三届中国国际阀门论坛 . 2010
• 3. LNG上装式超低温固定球阀阀座密封研究 [A] . 郁勇 . 2016