swing crane是什么意思 swing crane怎么读
swing crane的用法和样例
- If the site is small, it may be commanded by a gantry crane.
假如场地小，则可采用龙门式吊车进行操作。 - One difficulty in every building for heavy industry is the arrangement of the supports for an overhead crane.
重工业的所有厂房均存在一个困难问题，即如何布置桥式吊车的支承结构。
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