Collapsible plastic tree
作者： Herbert P. H. Huang
DOI:
关键词: Composite material 、 Structural engineering 、 Trunk 、 Tree (data structure) 、 Engineering
摘要: The present invention relates to an improved collapsible plastic tree and in particular one comprising a trunk having plurality of holes, collars disposed on the trunk, ribs movably mounted collars, branches each firmly joined ribs. will lay open with respect when is vertically be folded up upside down.
lens.org 参考文章(1)
Alan Mottel, Artificial tree with hinged branches ,(1974)