中里 裕一, 伊藤 章人, 中島 一, 滝田 謙介, 樋口 勝
日本機械学会論文集
80
(820),
TRANS0347-TRANS0347,
2014
The aging population and the ratio of 65 years old or more increase rapidly at time when the baby boom generation and baby boomers enter the aging population, receive lower birthrates afterwards, …
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