5-15 tons track jack 1.working methods:manual operation 2 ... QD15 15tons 7.5tons 280mm 580m 60mm2. widely usedApply to the complementary set, an axle railway bridge installation, and ... equipment, heavy lifting with, the structure is simple, easy to use, safe and reliable, and many machine etc. It ... hoisting tools, compact structure, reasonable use a joystick to move up and down swinging the claw, with the ...