Jinan Avitt International Trade Co., Ltd-HYCM Tower Crane emma1109@foxmail.com 0086-182-54159408
Simply, the easiest way to tell this difference is that a derrick will have legs normally without mast sections from which the boom is fixed and can move at an angle to lift. When it comes to cranes, the boom itself is the main support structure of the hoist system.
it normally used on the roof of building to dismeantle the inner climbing type tower crane