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domain	apsystemsema.cn
summary	The main points of the article are about a man named Thomas who was a successful engineer and inventor in the late 1800s and early 1900s. He patented an improved type of vacuum cleaner, which he believed could be mass-produced for widespread use in homes. Thomas aimed to create a more convenient cleaning device that would reduce the amount of labor needed by women at home. His invention used a rotary brush system and a dust bag, which made it efficient in sucking up dust and debris. However, despite its innovative design, his vacuum cleaner did not achieve commercial success due to its high cost and the difficulty of manufacturing it on a large scale.
title	Title
description	Title
keywords
upstreams
downstreams
nslookup	A 60.190.131.190
created	2025-03-26
updated	2025-03-26
summarized	2025-03-27