sphere check valve的意思|示意
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球形止回阀
sphere check valve的网络常见释义
落球式止回阀 ... 旋启式止回阀 swing check valve. . . flap check valve 落球式止回阀 sphere check valve 弹簧球式止回阀 spring sphere check valve ...
sphere check valve相关短语
1、 spring sphere check valve 弹簧球式止回阀