mobile crane的用法和樣例：
例句
- This machine is called Bridge Gantry Crane.
這種機器叫路橋門式起重機。 - It provides a theoretical basis for super-low headroom large tonnage overhead traveling crane development.
為柔性化設計理念提供了有力的支持，同時為超低凈空大噸位橋式起重機的成功研製奠定了理論基礎。 - If the site is small, it may be commanded by a gantry crane.
假如場地小，則可採用龍門式吊車進行操作。 - One difficulty in every building for heavy industry is the arrangement of the supports for an overhead crane.
重工業的所有廠房均存在一個困難問題，即如何布置橋式吊車的支承結構。
