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岩心钻机 yánxīn zuànjī
gen. drill
tech. core boring rig; core drill rig
岩心钻机利用管状钻头的回转作用切削、磨碎岩石，并不断向深部钻进以提取岩心的机械 yánxīn zuànjī
expl. core drill
岩心钻机: 2 phrases in 2 subjects
Earth sciences1
General1

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