About JHJX:JHJX Machinery Manufacturing Co.Ltd was established in 1992 specialized in manufacturing hydraulic torque wrench, bolt tensioner,electric/pneumaitc torque wrench, torque calibration equipment. JHJX working with advanced CNC machining equipment focus on large bolts and nuts tightened, unpacking technology and power hydraulic practical research. JHJX products are widely used in mines, power plants(wind power, hydropower, thermal power, nuclear power) metallurgy, aerospace, shipbuilding, petroleum, chemical, railway, machinery manufacturing and other industries all over the world.JHJX  is committed to providing customized bolts, nuts, solutions and full , complete technical support services.Our company has a factory and office covering 12,000 square meters in Ma···