retaining ball 中文意思是什麼
retaining ball
解釋
制動球-
Ball retaining spring
滾珠回位彈簧 -
Ball valve design includes reinforced / enhanced ptfe seats and electroless nickel plated brass ball, blow - out proof pressure retaining stem, and low profile oval handle
球閥結構包括強化聚四氟乙烯( ptfe )閥座和非電解鎳鍍層黃銅球體,防吹出壓力保持閥桿,以及低矮型橢圓手柄。
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