Trunnion Design: Upper and lower supports retain ball under pressure.
耳轴设计：在压力下上下支持阀球。
In general, WILLIAMSONs trunnion ball valve features the front ball sealing design structure.
威廉姆森固定球阀一般采用球前阀座密封结构。
The full series are structure of trunnion mounted ball.
全系列采用固定球结构。
The full series are structure of trunnion mounted ball.
全系列采用固定球结构。
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