electric traction line造句
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electric traction line造句怎么造
1、 For investigating the air pollution in double line railway tunnel by electric traction, we tested the air condition in Jundushan tunnel.(为了解电力牵引的双线铁路运营隧道空气污染状况,选择军都山隧道进行现场测试。)
electric traction line拼音解释
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ài yì
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