| 摘要 |
PROBLEM TO BE SOLVED: To provide a fish preserve excellent in soil-preventing property and without being troubled by attached algae, shells, etc. SOLUTION: This fish preserve consisting of a frame body composed of an upper surface frame and a lower surface frame consisting of frame materials and frame materials joining the upper surface frame with the lower surface frame, and a net body spreaded on the frame body, has a closed hollow space in the frame materials and a structure capable of pouring water or filling air in the hollow space. By pouring water in a part of the hollow space and filling air in at least a part of the rest of the hollow space and rotating the fish preserve optionally, a net surface attached with the algae, shells, etc., is exposed above the surface of water for drying the attached materials and falling them off. COPYRIGHT: (C)2003,JPO
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