Coal Rake(煤层), 此释义来源于网络辞典。
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coal rake seam 煤层
the coal rake gas 煤层气
through upper coal rake pillar 过煤柱压力
·2,447,543篇论文数据，部分数据来源于NoteExpress
Introduce the several improving schemes, the characteristics and their application results about rake thickener in Huaibei Coal Preparation Plant.
介绍耙式浓缩机在淮北选煤厂的多次改造方案、特点及应用效果。
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The United States heavily subsidizes oil, gas and coal production to the tune of tens of billions of dollars, even as oil companies rake in record profits.
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