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有効 (5年前)ジャニラブポイント： 6
Valves 101: Two Types of Ball Valves
Small-size valve balls are a type of piping equipment that shuts off or controls the flow in a pipeline by using a hollow sphere and round seats held in a valve body. There are two basic technologies for the design of ball valves, floating ball design and trunnion mounted ball design. […] 表示