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.
品牌：进口外螺纹针型阀可配带不锈钢焊接管，能与管道直接对焊连接，也可通过外螺母拆卸阀门。
Germany RBT import external thread needle valve can be equipped with stainless steel welded pipe, and pipeline butt welding connection, but also through the outer nut removing the valve.
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