| 摘要 |
PROBLEM TO BE SOLVED: To attenuate water stream force overflowing a partition wall and facilitate upstream swimming of small-sized fishes and shellfishes. SOLUTION: In a pool type fish pass 1 in which a plurality of partition walls 2 are erected in a stream direction, a number of recesses and projections vertical or inclined to the partition wall 2 are provided at least in the downstream side 2c. COPYRIGHT: (C)2003,JPO
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