风动潜孔钻跟管钻具在松散堆积体中的膏浆快速成幕技术的应用
풍동잠공찬근관찬구재송산퇴적체중적고장쾌속성막기술적응용
Application of pneumatic DTH drilling with casing in loose accumulation body for fast forming of paste-slurry curtain
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