female connection
... EKO 不锈钢波纹管 RI 内螺纹连接 RA 外螺纹连接 ...
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... female screw connection 内螺纹连接 female outlet connection 内螺纹出口接头 female thread connection plunger valve 内螺纹联接柱塞阀 ...
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直内螺纹连接头 straight female connector
上端内螺纹连接 Top Upset Joint
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连接方式：内螺纹连接；
Connection mode: internal thread connection;
youdao
按连接方法分类(1)螺纹连接阀门：阀体带有内螺纹或外螺纹，与管道螺纹连接。
According to connection method classification (1) threaded connection valves: valve with internal thread or external thread, and pipe thread connection.
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