“drop log”的概念、定义、翻译、参考文献-科学参考

单词	drop log
释义	drop log [`dräp ´läg] ^{MINING ENGINEERING} A timber which can be dropped across a mine track by remote control to derail cars.
随便看	humpback Humphrey gas pump Humphreys series Humphrey's spiral Humphries equation hump yard Humult humus Hund coupling cases hundred-percent rectangle hundredweight Hund rules Hundsdieke reaction hunger hungry joint hung shot Hunner's ulcer hunt Hunt and Douglas process Hunt continuous filter hunter's moon hunting hunting circuit Hunting Dogs Huntington-Heberlein process

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