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2. Bard (company) - Wikipedia

   en.wikipedia.org/wiki/Bard_(company)

   In 1961, Bard expanded beyond catheters, and began manufacturing products related to cardiology, radiology, and anesthesiology. C. R. Bard went public in 1963 and was listed on the New York Stock Exchange in 1968. Over time, the company introduced a variety of new health care products, and its net sales first exceeded $1 billion in 1994.

3. HVAC control system - Wikipedia

   en.wikipedia.org/wiki/HVAC_control_system

   HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...

4. Plenum space - Wikipedia

   en.wikipedia.org/wiki/Plenum_space

   In all such cases, discovery, and repair of such problems to eliminate unintended plenums is difficult due to the hidden nature, limited space, and difficult access of most installed drop ceilings. For highest fire safety, it is best to assume all drop-ceiling and raised-floor airspaces are plenums, whether or not they are officially designated ...

5. Bellows - Wikipedia

   en.wikipedia.org/wiki/Bellows

   Diagram of a fireplace hand-bellows. A bellows or pair of bellows is a device constructed to furnish a strong blast of air.The simplest type consists of a flexible bag comprising a pair of rigid boards with handles joined by flexible leather sides enclosing an approximately airtight cavity which can be expanded and contracted by operating the handles, and fitted with a valve allowing air to ...

6. List of most-polluted rivers - Wikipedia

   en.wikipedia.org/wiki/List_of_most-polluted_rivers

   [220] Fish kills and submerged vehicles were a common sight, along with toxic chemical plumes that colored parts of the river pink and orange. [221] The Standells sang about the Charles in their 1965 song "Dirty Water". A combination of public and private initiatives helped drastically lower levels of pollutants, leading to the first "public ...

7. Remove Banner Ads with Ad-Free AOL Mail | AOL Products

   www.aol.com/products/utilities/ad-free-mail

   SYSTEM REQUIREMENTS. Mobile and desktop browsers: Works best with the latest version of Chrome, Edge, FireFox and Safari. Windows: Windows 7 and newer Mac: MacOS X and newer Note: Ad-Free AOL Mail ...