| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to remove sand accumulated in an inflow ditch. SOLUTION: This is an inflow ditch facility built between a trunk line 1 and a sand basin 3, and carrying equipment 31 for carrying sand or the like settled in the main body of an inflow ditch 2 is carried to a sand basin 3 by the carrying equipment 31.
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