Portable sports bench
作者： Emanuel Kohelis , Scott D. Ramsey , Aaron Marshall
DOI:
关键词: Mechanical engineering 、 Rest (physics) 、 Engineering 、 Structural engineering
摘要: A portable bench includes a first seat member, back rest member attached to the second and member. The attaches such that at least one of pivots about axis. axis is substantially perpendicular third parallel
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