Body assist for toilet seat
作者： John L Grondona
DOI:
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lens.org 参考文章(7)
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Bennett Grady Howard, Three-way baby chair ,(1947)
Leopold Antonin Jaubard, Seat for water-closets. ,(1913)
Jesse R Oakley, Commode attachment for water-closets for children. ,(1905)
Wolff Martha, NURSERY-SEAT FOR CHILDREN. ,(1905)