1. QTZ50 tower crane, a type of self-elevating top slewing tower crane, is designed and manufactured by Shandong Mingwei hoisting equipment Co., Ltd. Which has good quality and competitive price. 2. This tower cane is the crane with vertical arm support, trolley travel and up-rotary hydraulic jack-up system. Its maximum load capacity is 5t. maximum radius is 50m. Tip load is 1.0t, independent ...