lever safety valve 中文意思是什麼
lever safety valve
解釋
杠桿安全閥-
Hand wheel, lever and spanner driving and safety valve, pressure reducing valve, traps overleap this symbol
注: 1 、手輪、手柄和扳手傳動以及安全閥、減壓閥、疏水閥省略本代號。 -
Lever and weight loaded safety valve
杠桿式安全閥
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