If you need to create a high vacuum, there are basically two options: turbomolecular pumps and diffusion pumps. Turbomolecular pumps require rotors spinning at many thousands of rotations per ...

To help you get back on track and save money on your energy bill, there’s a speedy, five-minute hack that will restore your refrigerator’s energy use to an efficient level.

EPA refrigerant rules are changing. Learn how the shift to R-1234yf affects tractor and farm vehicle A/C systems, tools and maintenance.

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