According to connection method classification (1) threaded connection valves: valve with internal thread or external thread, and pipe thread connection.
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。
To metal seal is provided to effectively prevent both internal and external leakage of the valve.
对金属辅助密封结构，有效地控制阀门的内漏和外漏。
Products are mainly IC Card Gas Control valve - internal, external and industrial valves.
现主要产品IC卡燃气控制阀-内置、外置及工业用阀门。
Products are mainly IC Card Gas Control valve - internal, external and industrial valves.
现主要产品IC卡燃气控制阀-内置、外置及工业用阀门。
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