Celebrating mechanical and electrical engineer David N. Crosthwait Jr., who invented an improved boiler system, a new thermostat control, a new differential vacuum pump, and other items in an effort to improve ventilation system efficiency in large buildings....
3 comments:
Boom. Worldwide
We got another. I wish the young ppl that continue to join gangs and commit crimes could get some inspiration from their ancestors and stop committing crimes.
👀👀
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