A vacuum gauge is a pressure gauge used to measure pressures lower than the ambient atmospheric pressure, which is set as the zero point, in negative values (e.g.: −15 psig or −760 mmHg equals total vacuum).
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To add technology and advancements to society and make out community more advanced.
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a drawing, at relatively large scale, of a part of a building, machine, etc., with dimensions or other information for use in construction.
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there are three stages of heat treatment
1.hit the metal slowly to ensure that the metal maintains a uniform temperature
2.soak or hold the metal at a specific temperature for a alloted period of time
3.cool the metal to room temperature
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To know because getting knowledge is better than not getting it. It won't hurt u or harm u it will help