Tower Crane 1.CE, ISO 2.a leading one in China ... products of the Group cover QTZ series tower crane,engineering machinery,single/twin beam bridge crane.It was selected as "Designated Products for Construction ... , Braking smoothly and impact is small, long service life.5.It is widely used with many working modes, and it ... is applied in extensive projects 10t self erecting tower crane parts QTZ6313(125)