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双工作面同一煤层〈分层〉内同时生产并共用工作面运输巷的两个相邻长壁工作面。两工作面相向运煤的双工作面又称“对拉工作面”
expl. double-unit face; double face
双工作 面: 3 phrases in 2 subjects
Automobiles1
Technology2

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