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 longwall 添加此单词到默认生词本
['lɔŋwɔ:l;'lɔ:ŋ-]
adj.
[矿]长壁开采法的




    1. Workers were not required to use the regulator, since mining in the section had been completed on Sept. 6, and the four workers who died in the area of high methane concentration were dismantling a longwall mining machine, Smith said.
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