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2. Blast furnace - Wikipedia

   en.wikipedia.org/wiki/Blast_furnace

   Blast furnaces differ from bloomeries and reverberatory furnaces in that in a blast furnace, flue gas is in direct contact with the ore and iron, allowing carbon monoxide to diffuse into the ore and reduce the iron oxide. The blast furnace operates as a countercurrent exchange process whereas a bloomery does not.

3. Johnson Controls - Wikipedia

   en.wikipedia.org/wiki/Johnson_Controls

   Johnson Controls office in Ontario. Johnson Controls International plc is an American, Irish-domiciled multinational conglomerate headquartered in Cork, Ireland, [3] that produces fire, HVAC, and security equipment for buildings. As of mid-2019, it employed 105,000 people in around 2,000 locations across six continents. [4]

4. Vacuum furnace - Wikipedia

   en.wikipedia.org/wiki/Vacuum_furnace

   A vacuum furnace is a type of furnace in which the product in the furnace is surrounded by a vacuum during processing. The absence of air or other gases prevents oxidation, heat loss from the product through convection, and removes a source of contamination. This enables the furnace to heat materials (typically metals and ceramics) to ...

5. Overlooked and disengaged: How Gen Z’s blue-collar bloc could ...

   www.aol.com/overlooked-disengaged-gen-z-blue...

   Kavaughn Moncrieffe, 23, said he has thought about going into a four-year degree program after he earns his GED certificate but, as a busy father of young children, programs in HVAC and audio ...

6. High levels of lead found in 12 cinnamon brands. List to avoid.

   www.aol.com/consumer-reports-high-lead-levels...

   Purchased from 17 stores in Connecticut, New Jersey, New York and online, 12 of 36 brands measured above 1 part per million of lead — the threshold that triggers a recall in New York, the only U ...

7. How to Find Valuable Books in Thrift Stores, Estate Sales ...

   www.aol.com/valuable-books-thrift-stores-estate...

   Joshua R. Mann, co-owner of B&B Rare Books in New York City. Related: 14 Valuable Collectibles to Look for in Thrift Stores. Check If It's a First Edition. Open the book to the copyright page ...