英语翻译
问题描述：
英语翻译
Cranes not provided with their own means of mechanical propulsion are classified as portable.
Machines in any of these categories may be full-slewing,part-slewing or non-slewing.
8-1 is essentially a mobile crane equipped with two prime revolving movers-one for travel-drive,and one for crane-drive.
答
起重机不提供自己的意味着机械推进分为便携.
机器在任何这些类别可能是全回转,部分回转或非回转.
8 - 1实际上是一个移动吊车配备两个主要旋转搬家公司一个为旅游驱动,一个用于起重机驱动.