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2. Manual vacuum cleaner - Wikipedia

   en.wikipedia.org/wiki/Manual_vacuum_cleaner

   The manual vacuum cleaner was a type of non-electric vacuum cleaner, using suction to remove dirt from carpets, being powered by human muscle, similar in use to a manual lawn mower. Its invention is dated to the second half of the 19th century, when patents were granted to inventors in the United States, Britain, France, and elsewhere.

3. Turbomolecular pump - Wikipedia

   en.wikipedia.org/wiki/Turbomolecular_pump

   Interior view of a turbomolecular pump. A turbomolecular pump is a type of vacuum pump, superficially similar to a turbopump, used to obtain and maintain high vacuum. [1] [2] These pumps work on the principle that gas molecules can be given momentum in a desired direction by repeated collision with a moving solid surface.

4. Hitachi - Wikipedia

   en.wikipedia.org/wiki/Hitachi

   Hitachi, Ltd. [nb 1] (Japanese pronunciation: [çi̥taꜜtɕi]) is a Japanese multinational conglomerate founded in 1910 and headquartered in Chiyoda, Tokyo.The company is active in a range of industries, including digital systems, power and renewable energy, railway systems, healthcare products, and financial systems. [4]

5. Belt (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Belt_(mechanical)

   An automotive belt with the number "740K6" or "6K740" indicates a belt 74 inches (190 cm) in length, 6 ribs wide, with a rib pitch of 9 ⁄ 64 of an inch (3.6 mm) (a standard thickness for a K series automotive belt would be 4.5mm). A metric equivalent would be usually indicated by "6PK1880" whereby 6 refers to the number of ribs, PK refers to ...

6. Hitachi Construction Machinery - Wikipedia

   en.wikipedia.org/wiki/Hitachi_Construction_Machinery

   Hitachi Construction Machinery Co., Ltd. was established in 1970, and was involved in the production of Japan's first mechanical excavator.The company has now become a major construction equipment manufacturer in the world, and it is listed on the Nikkei 225.

7. List of Henry vacuum cleaners - Wikipedia

   en.wikipedia.org/wiki/List_of_Henry_vacuum_cleaners

   Henry Quick - A cordless stick vacuum cleaner, much different to the other drum models. It only has a 60 minute battery life. 1-litre capacity. Charles (CVC370) - Larger blue wet-and-dry vacuum with a 15-litre dry and a 9-litre wet capacity which was also available in red, green and yellow at one time. In the late 1980s, this model and some ...