Special thread for gas cylinder的意思|示意
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气瓶专用螺纹
Special thread for gas cylinder的网络常见释义
气瓶用锥螺纹 ... ----干密封燃油直管螺纹Dryseal straight pipe internal thread ----气瓶用锥螺纹Special thread for gas cylinder 三、米制螺纹Metric thread ...