岩心钻孔 – phrases

Terms for subject Explosives and Explosive Ordnance Disposal containing 岩心钻孔 | all forms

Chinese	English
钻孔岩心采取率衡量岩石钻探工程质量的一项重要指标，是钻进采得的岩心长度与相应实际钻进尺之比,以百分率表示	recovery of drilling hole