buttress threaded screw
按钮开关 button switch; push button switch; push-button switch 锯齿形螺钉 buttress threaded screw 旁通管 by-pass pipe ..
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机械工程专业英语词汇翻译 ... 螺旋桨 screw, air 锯齿形螺钉 screw, buttress thread 有头螺钉 screw, cap ...
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