... Truck tail lift specifications: 1, The QWB tail plank is five urns of full-automatic equilibrium system products.The liquid presses ... operating a more equilibrium safety. 2, The QWB tail plank liquid presses a pump and oil urn, seals completely a pieceand ... , easy tooperate. 4, The special tail plank liquid press system establishes a liquid system to pressflameproof valve, can avoid surprised loss ...