发明授权
摘要:
A wind propelled surfboard which has a catamaran hull wherein each hull can be folded to a collapsed position. Also, the mast and boom are capable of being folded when into a collapsed position when not in use.
公开/授权文献
- US4058665A Novel 3,15-dilower alkyl PGE.sub.2 derivatives 公开/授权日:1977-11-15
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