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beam hole英英字典_beam hole剑桥英语解释_beam hole柯林斯英文解释_食材鋪反向词典
食材鋪反向词典

beam hole

B 开头单词

柯林斯词典

    beam hole

  • 1. N a hole in the shield of a nuclear reactor through which a beam of radiation, esp of neutrons, is allowed to escape for experimental purposes 引束孔道

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