The problem of extracting drilling tool wears character signal is studied.
研究了钻削过程中刀具磨损特征信号的提取。
The air screw drill tool was power equipment which was designed for air drilling.
空气螺杆钻具是专为空气钻井而设计的动力装置。
The air screw drill tool was power equipment which was designed for air drilling.
空气螺杆钻具是专为空气钻井而设计的动力装置。
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