Technical parameters: national key project Hong Kong Zhuhai Macao tunnel project: sand and stone conveying system: the system consists of 12 conveyors, including four B = 1000 unloading trucks (with horizontal belt conveyor); bandwidth: 1000mm, total length: 1882m; conveying materials: sand and stone; power: 45 ~ 160kW; conveying capacity: 1000t / h