... is a special equipment which is able to do sand washing, sand washing fluid-handing and oil recovery. PRODUCT DESCRIPTIONThis is ... equipment which has four uses , sand washing, sand washing fluid-handing, flushing and crude oil recovery. Sand washing besides, this truck can treat the ... rig, water well drilling rig, core drilling rig, sand washing truck, flushby rig, dewaxing unit as well as most ...