... deep hole blasting 深孔爆破 deep level development 深部水平开拓 deep mining 深部开采 ...
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In combination with the features and application requirements of anhydrite, the specific direction in deep-level development of anhydrite was pointed out.
结合硬石膏的特性和应用要求，指出了硬石膏深层次开发的具体方向。
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