| 摘要 |
A boomstick for use in log rafts is made of a hollow sheet pipe and therefore has a far longer life than conventional boomsticks made of wood. The boomstick is flexibly joined with other boomsticks and comprises a hollow steel pipe with an outside diameter to permit installation of pneumatic tires thereon, a plurality of tires installed on the pipe, end discs larger in diameter than the pipe, welded at both ends of the pipe to retain the tires on the pipe and provide a sealed pipe to float in water, and attachments on the boomstick for connection by attaching chains.
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