Combination awning and swimming pool cover
作者： Same E Sears
DOI:
关键词:
摘要:
lens.org 参考文章(3)
Macisaac Donald, Hoist for building material ,(1938)
Samuel A Kornsweet, Bathing-beach float ,(1928)
Leland T Mcgee, Covered swimming pool ,(1953)