“rocker shovel”的概念、定义、翻译、参考文献-科学参考

单词	rocker shovel
释义	rocker shovel [`räk·ǝr ´shǝv·ǝl] ^{MINING ENGINEERING} A digging and loading machine consisting of a bucket attached to a pair of semicircular runners; lifts and dumps the bucket load into a car or another materials-transport unit behind the machine.
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