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... e stuff used on this device is not even a barometric sensor at all.
This so-called air pressure sensor is actually a gas cylinder similar to a syringe needle, but its inside is vacuum. Because the inside of the oil barrel was always in a vacuum state, the internal vacuum gas cylinder will not have any reaction. However, once the pressure of the oil barrel is relieved, the gas cylinder is affected by the external atmospheric pressure, and the external piston will be quickly pressed into th ...
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