costeaning
'kɒsti:ənɪŋ
基本解释
槽探
英文释义
n. The process by which miners seek to discover metallic
lodes. It consist in sinking small pits through the superficial
deposits to the solid rock, and then driving from one pit to another
across the direction of the vein, in such manner as to cross all the
veins between the two pits.
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