dry cleaning drilling rod.
干式吸尘钻杆
LOW CARBON MARTENSITE STEEL FOR ROCK DRILLING ROD
低碳马氏体钢重型凿岩钎杆的研制
Construction method with rotary drilling machine and occlusive rod
旋挖钻机与钻孔咬合桩施工工法
Experimental study on frictional factor between chuck jaw and drilling rod
沟槽式卡瓦与钻杆摩擦系数的试验研究
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