Resilient support for trailer tongues
作者： Charles T Hartman
DOI:
关键词: Trailer 、 Aeronautics 、 Computer science
摘要:
lens.org 参考文章(2)
Martin H Mathisen, Safety load equalizing and draft stabilizing coupling device for automobile towed trailers ,(1951)
William D Mosley, Trailer hitch structure ,(1952)