起重机的用英语怎么说？

起重机的

例句

• sluing the boom of a crane. 转动一台起重机的吊杆
• Don’t stay under the arm of a derrick! 不要在起重机的吊臂下!
• It is used for the crane slewing bearing. 这是用于起重机的回转支承.
• Laborers were trained to handle 50 - ton compactors and giant cranes. 工人们接受操作五十吨压土机和巨型起重机的训练.
• Don't stay under the arm of a derrick! 不要在起重机的吊臂下!