Boat trailer attachment

作者: G Reder

DOI:

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摘要: An attachment for use with a boat trailer having an upstanding post and winch mounted on the post. The includes extensible arm, which may comprise outer sleeve inner telescoping member, adapted to be coupled rope can trained about pulley carried at end of then secured so that operation causes member move out push rearwardly respect trailer.

参考文章(1)
Thomas L Faul, Jr Harry A Leeder, Boat trailer with push-off device ,(1963)