bolt torque testing equipment High quality screw Bolt pull and torsion testing machine Main parameter： 1. potestate ratio: 220 V±10V AC 50 ± 2Hz。 2. Axial vis range: 10-500kn. 3. Torque range: 50 ~ 2000Nm. 4. Magnum exagonum fulmen: M12 ~ M30. 5. Torsion tondendas pessulus: M16～ M30. 6. potentia copia: 380V ratio loading ± 10V AC …