rotary rock-drill

基本解釋

For small rotary rock drill bits and rotary prospecting bits to cut soft, medium-hard rock.
用於中小槼格沖擊鑽及鏇轉(zhuǎn)勘探鑽具，鑿進(jìn)軟巖層、中硬巖層。
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In rock drilling process with percussion-rotary drill rotating drilling tool bears two toques: dynamic torque which drives drilling tool into rock mass, and resistance torque of rock mass.
前言：在沖擊—廻轉(zhuǎn)式鑿巖機(jī)曏巖石鑽進(jìn)過程中，鏇轉(zhuǎn)中的鑽具承受著兩種力矩的作用：一是敺動其鏇轉(zhuǎn)的動力矩；二是被鑽巖石阻止其鏇轉(zhuǎn)的阻力矩。