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drift /ˈdɹɔːstɹɪŋ ˈbaɡ/ n

中文：平巷

中文 · 平巷Español · galería de arrastreFrançais · galerie en direction
Meaning：Passageway dug horizontally along the grade line of the ore seam; it can also be dug into the ore vertically.
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Underground coal mine

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