stem seal meaning in English

填料
芯轴密封

Standard for qualification of control valve stem seals
控制阀门密性封的鉴定标准
Products oil seals special seal valve stem seal
产品介绍油封-密封件特殊油封汽门油封
Safer and tighter stem seal
更安全、更紧密地阀杆密封。
Backseat ? machined bonnet stem bushing provides back - up stem seal
后座-经过精密加工的阀盖阀杆衬套实现后座阀杆密封。
Valve stem seal bonded seal
汽门油封

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