... metal parts of high quailty and best after-sales service,we giansun high precision mechanical components co, ltd isa factory ... in hardware parts and other steel partsproduction.We Giansun Precision Components Co., Ltd,which is subsidiary to Giansun group ... , horizontal boringmachine, slow-feeding WEDM, drilling machines,high-precision cylindrical grinder, surface grinder,bench-type drilling machine and ...