rotary rock drill

常見(jiàn)例句

For small rotary rock drill bits and rotary prospecting bits to cut soft, medium-hard rock.
用于中小規(guī)格沖擊鉆及旋轉(zhuǎn)勘探鉆具，鑿進(jìn)軟巖層、中硬巖層。
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The rock stratum drilled by a rotary drill is random distributed and complicated, so it is difficult to define the drilling process.
牙輪鉆機(jī)鉆鑿的巖層是隨機(jī)分布、錯(cuò)綜復(fù)雜的，因而鉆進(jìn)過(guò)程難以定義。
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—回轉(zhuǎn)式鑿巖機(jī)向巖石鉆進(jìn)過(guò)程中，旋轉(zhuǎn)中的鉆具承受著兩種力矩的作用：一是驅(qū)動(dòng)其旋轉(zhuǎn)的動(dòng)力矩；二是被鉆巖石阻止其旋轉(zhuǎn)的阻力矩。