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开心英文字典

middling coal

M 开头单词

常见例句

    双语例句

  • The most reactive coal is in the middling coal-bank;
    含灰量低的中等变质程度的煤氧化活性最高；
  • The coals used included high-sulfur raw-coal, low-sulfur raw-coal and middling coal.
    所用煤种包括高硫原煤、低硫原煤、中煤。
    • 返回 middling coal