Profile: JHJX Machinery Manufacturing Co., Ltd. is specialized in manufacturing bolt tensioner, electric torque wrench, and electric hydraulic pump. We work with advanced CNC machining equipment, and focus on tightening of large bolts & nuts, unpacking technology, and power hydraulic practical research. Our products are widely used in mines, power plants (wind power, hydro power, thermal power, nuclear power) metallurgy, aerospace, ship building, petroleum, chemical, railway, and machinery manufacturing.