[机] 阀转杆, 阀杆

valve stem的用法和样例：

例句

Slide the top bearing on the stem.将顶部轴承移到阀杆上。
Valve shall have a brass body and stainless steel stem and spring.这种阀门应该是黄铜阀体，不锈钢阀杆和弹簧。

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