... ,explosion-resistant. It caontains: light-duty,middle-sized and heavy-duty. ISO,CE. Carbon steel About us We are manufacture in China ... standards of the GB,ZB, CE, ISO. Conveyor Idler roller type: Components and belt conveyors spare parts 1. Belt(4 kinds ... : 1 set at leastDelivery time: Within 30 days, FOB, shippment. explosion-proof belt conveyor machinery for coal mining use