| 摘要 |
PROBLEM TO BE SOLVED: To provide a sand pump for sediment picking capable of sufficiently displaying water injection ability from a injection nozzle and easy to handle. SOLUTION: In the sand pump device for sediment picking which sucks sediment on the bottom of the water from a water suction port 13 with a first submerged pump 12, an injection nozzle 14 for jetting water for picking sediment on the bottom of the water and a second submerged pump 15 for supplying water to the injection nozzle 14 are installed.
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