Invention Grant
US3477641A Flow interrupter type gas safety control operated by rotary knob for pilot,on and off in any rotary position of knob 失效
旋转中断器类型气体安全控制由旋转KNOB操作,用于在任何旋转位置的导弹,开启和关闭

Flow interrupter type gas safety control operated by rotary knob for pilot,on and off in any rotary position of knob
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