[化] 螺纹连接

threaded connection的用法和样例：

例句

Threaded end connection checks shall have an iron body and solder end connection checks shall have a bronze body.螺纹连接端口的止回阀应该是铸铁阀体，焊接连接端口的止回阀则应该是青铜阀体。
Threaded connections may only be used if allowed for by piping specifications, otherwise these shall be flanged.螺纹连接只可在配管规范的允许下使用，不然应是法兰式的。

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