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prospecting hole
tech. 勘探孔; 探孔; 普查钻
prospect hole
coal. 探孔〔井〕
el. 勘探钻孔
eng.geol. 勘探孔
hydroel.st. 探井; 试坑; 探孔
tech. 试孔; 普查钻
prospecting hole
: 6 phrases in 1 subject
Technology6

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