| 摘要 |
PROBLEM TO BE SOLVED: To provide a fishnet expander capable of improving fishnet-expanding performance, and to provide a trawl fishing including the same. SOLUTION: The fishnet expander is such that a warpage is formed at a blade part 32, and the efflux port 40 of a ridge part 37 is formed on the end opposite to an influx port 38 in the first direction of the ridge part 37, thus markedly improving lifting force acting on the blade part 32 as compared with conventional cases and securing the shape stability of the blade part 32 in towing. COPYRIGHT: (C)2011,JPO&INPIT
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