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.
作者根据在实验室和矿山对柱齿钎头破岩的最优旋转角的测试结果，提出了与某些专家不同的看法。
Built-in rotary switch, button, ampere meter, indicating lamp etc.
内装转换开关、电流表、按钮、指示灯等。
Built-in rotary switch, button, ampere meter, indicating lamp etc.
内装转换开关、电流表、按钮、指示灯等。
应用推荐