... (Chongqing) Haizhuang Windpower Equipment Co., Ltd.Chongqing Gearbox Co.,Ltd.With 3200 and 1600 Tons of hydraulic machine, 5 Tons of ... -hydraulic hammer, 2*6m and numerical control (NC) machine, large vertical lathe and horizontal lathe, 4m deep-hole boring machine, etc ... strict quality assurance system will conduct throughout the entire production. wind generator nuts