• According to the button bits test on optimum rotary Angle in cutting rock, the author put forward a view that is distinct from some specialists.

    作者根据实验室和矿山柱齿破岩最优旋转测试结果,提出了某些专家不同看法

    youdao

  • Built-in rotary switch, button, ampere meter, indicating lamp etc.

    转换开关电流表按钮指示灯

    youdao

  • Built-in rotary switch, button, ampere meter, indicating lamp etc.

    转换开关电流表按钮指示灯

    youdao

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