Guide device for boat trailers

作者: Donald D. Schwebke

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摘要: A guide device for boat trailers includes a pair of devices each being mounted on one the rear frame members trailer and including vertically oriented roller. Each also an obliquely roller which is positioned adjacent associated vertical The rollers are adjustable oblique its laterally as unit to permit proper spacing between maintain in centered relation it pulled upon trailer.

参考文章(3)
Richard L. Easterwood, Boat loading and trailer device ,(1965)
John E Hanna, Clyde C Peake, Boat trailer bow guide ,(1960)
Clark E West, Boat-centering apparatus ,(1967)