“double-drum hoist”的概念、定义、翻译、参考文献-科学参考

单词	double-drum hoist
释义	double-drum hoist [¦dǝb·ǝl ¦drǝm `hoist] ^{MECHANICAL ENGINEERING} A hoisting device consisting of two cable drums which rotate in opposite directions and can be operated separately or together.
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