DOUTEC POWER is initially a pure technical corporation,Website:http://www.dudemachinery.com, who worked as consultant for bolt tools factories to solve technical problems, offered special solutions to big projects and provided products testing, site debugging, as well as after-sale service for these factories. Thus it gained rich actual experiences on solutions to big bolts tightening & loosening. Depending on such experiences, DOUTEC POWER don’t want to be restricted on technical research any longer, but also have developed a series of professional torque tools for bolts tightening &...