inside screw lift check valve的意思|示意
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内螺旋升降止回阀
inside screw lift check valve的网络常见释义
内螺纹升降式止回阀 ... lift check valve 升降式止回阀 inside screw lift check valve 内螺纹升降式止回阀 FEMALE VERTICAL LIFT CHECK VALVE 内螺纹立式止回阀 ...