“underchain haulage”的概念、定义、翻译、参考文献-科学参考

单词	underchain haulage
释义	underchain haulage [¦ǝn·dǝr¦chān `hȯl·ij] ^{MINING ENGINEERING} Haulage in which the chains are placed beneath the mine car at certain intervals with suitable hooks that thrust against the car axle.
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