CRAWL

摘要

A crawl enabling an increase in durability while maintaining the inside volume of the crawl. A fixed frame is installed at the bottom part of a net to prevent the inside shape of the crawl from being changed by a tidal current. A bar-like member is fitted to the bottom part of the net, a weight is fitted to a sea bottom, and the weight is connected to the bar-like member with a cable. Also, a platform pipe (12) for connecting a floating body (10) to the net (20) is enclosed by a resin pipe (13) to insulate the buoyancy body (10) from the net (20).