main shaft_煤炭科技英汉词典
main shaft
[煤炭科技英汉词典]
main shaft主井
主要用于提运矿产品的井筒。
是什么意思，main shaft的解释，main shaft的翻译
[新英汉石油技术词典] main shaft
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[轻工业英汉词典] main shaft
[进出口英汉词典] main shaft
[造纸英汉词典] main shaft
