Electrically heated sleeping bag
作者： Wayland D Keith , Frances M Petty
DOI:
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lens.org 参考文章(4)
Hornsby Guyton Ellis, Heated baby carriage blanket ,(1959)
Russell S Colley, Inflatable protective container ,(1943)
Warren F Clark, Mattress for treating human body ailments by heat therapy ,(1943)
Mae G Eaker, Sleeping robe or blanket ,(1929)