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2. Central vacuum cleaner - Wikipedia

   en.wikipedia.org/wiki/Central_vacuum_cleaner

   Central vacuum cleaner. Central vacuum installed with an air inlet. Antique central vacuum inlet located in a dining room at Château Dufresne ( Canadian Register of Historic Places, c. 1918) Typical central vacuum cleaner power unit for residential use (North America) A central vacuum cleaner (also known as built-in or ducted) is a type of ...

3. Central vacuum system - Wikipedia

   en.wikipedia.org/?title=Central_vacuum_system&...

   Language links are at the top of the page. Search. Search

4. What is a Tympanic Membrane Retraction? - WebMD

   www.webmd.com/a-to-z-guides/what-is-a-tympanic...

   A tympanic membrane retraction, or retracted eardrum, is a condition where the tympanic membrane, or eardrum, gets pulled toward the middle of your ear. The tympanic membrane is a thin layer of ...

5. Manual vacuum cleaner - Wikipedia

   en.wikipedia.org/wiki/Manual_vacuum_cleaner

   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 ...

6. Central Connecticut Endoscopy Center Llc - WebMD

   doctor.webmd.com/practice/central-connecticut...

   PRIMARY LOCATION. Central Connecticut Endoscopy Center Llc. 440 New Britain Ave. Plainville, CT 06062. Tel: (860) 793-8500. Visit Website.

7. Centrilobular Emphysema: Symptoms, Treatment, and More

   www.healthline.com/health/copd/centrilobular...

   wheezing. tightness in the chest. shortness of breath while performing day-to-day tasks (dyspnea) chronic cough. producing excess mucus, also referred to as sputum or phlegm. fatigue. blueness of ...