Introduction Chassis description 20 tons of Sinotruk Howo 6×4 heavy duty wrecker, Sinotruk 340 horsepower engine, 10-speed gearbox, 12.00 steel wire tires, ABS, air conditioning, electric glass, electric doors and windows Modification instructions The 20-ton trailer has a one-piece top, a hexagonal two-section boom, a three-section trailing boom, two 10-ton hydraulic winches, a 40-meter steel wire rope, a double-sided linkage …