Crown-drilling pumping sand:
Large drilling-type pumping sand is mainly applied to a thick layer of mud conditions, first penetrated by the drill mud layer, and then extract the sand and mud layers below piped to shore, which is mainly aimed at the general mechanical suction dredgers and sand will not work site and shaped developed a suction sand, sand pumping capacity: 100-400 tons / hour, suction: greater than 55 meters power: 100-400 kilowatts.
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