Sailing and steering rig for attachment to flat bottom rubber boats or rafts
作者： John C Boyd
DOI:
关键词: Marine engineering 、 Natural rubber 、 Engineering
摘要:
lens.org 参考文章(1)
Fannie Layman, Hiram Douglas Layman, Florence Wilhelmina Parpart, Improved Collapsable Boats. ,(1898)