id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-14344		cet-14344		6	.pdf	application/pdf	3763	217	64	Theory – Stair climbing aid devices In this section, different stair-climbing aid devices are reviewed. For elderly people, a daily activity, climbing stairs, might be difficult.	cache/cet-14344.pdf	txt/cet-14344.txt