abrasion drill

基本解释

The invention also comprises an abrasion drill, a bone chisel, a spatula and a drag hook.
磨钻、骨凿、刮勺和拉钩；
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The main abrasion factors of drill holes for filling are analyzed and AHP quantitative method is adopted for Jinchuan Company's case.
分析了充填钻孔的主要磨损因素，引入层次定量化分析方法，对金川公司充填钻孔磨损因素进行了定量化分析。
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Flow fields at oil well bottoms, besides to serving the purpose of clearing rock chips and cooling drilling bits, also help to protect the drill bit's surface against excessive abrasion.
井底流场具有清岩和冷却切削齿的作用，同时又要保证射流不对钻头表面造成过多的磨损。