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2. Pressure switch - Wikipedia

   en.wikipedia.org/wiki/Pressure_switch

   The contacts of the pressure switch may be rated a few tenths of an ampere to around 15 amperes, with smaller ratings found on more sensitive switches. Often a pressure switch will operate a relay or other control device, but some types can directly control small electric motors or other loads.

3. Air source heat pump - Wikipedia

   en.wikipedia.org/wiki/Air_source_heat_pump

   [53] [64] The 100-year GWP of propane, at 0.02, is extremely low and is approximately 7000 times less than R-32. However, the flammability of propane requires additional safety measures: the maximum safe charges have been set significantly lower than for lower flammability refrigerants (only allowing approximately 13.5 times less refrigerant in ...

4. Open-hearth furnace - Wikipedia

   en.wikipedia.org/wiki/Open-hearth_furnace

   Open hearth furnace workers at the Zaporizhstal steel mill in Ukraine taking a steel sample, c. 2012 Tapping open-hearth furnace, VEB Rohrkombinat Riesa, East Germany, 1982. An open-hearth furnace or open hearth furnace is any of several kinds of industrial furnace in which excess carbon and other impurities are burnt out of pig iron to produce ...

5. He was supposed to win Ohio State a national title. Now, he's ...

   www.aol.com/news/supposed-win-ohio-state...

   Initially on track to graduate from high school in the spring of 2022, Ewers instead skipped his senior year of high school and reclassified to the class of 2021 to sign with Ohio State.

6. China's export ban to push antimony prices to new highs - AOL

   www.aol.com/news/chinas-export-ban-push-antimony...

   Antimony prices are likely to hit record levels as consumers seek alternative supplies following China's latest export ban with growing trade tensions changing the dynamics around markets for ...

7. ER2 electric trainset - Wikipedia

   en.wikipedia.org/wiki/ER2_electric_trainset

   Heating is provided by electric heating under the bench seats (intermediate trailers and power cars usually have 20 furnaces, driving trailers 14). Each furnace uses 1 kW of power; the voltage feed is 750 V (from the traction power supply), so the furnaces are mounted in electrically grounded outer casings for safety (2 furnaces in each casing).