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Units are basic
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Meter, mole, kilogram, second, ampere, kelvin, and candela.
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Vacuum box, английский
Device used to create a differential pressure over an isolated area of a weld or of a pressure boundary that cannot be directly pressurized.
Ultrasonic leak test, английский
Leak test that detects acoustic vibration frequencies approximately in the 40 khz range, which are produced by gas flowing through the leak path.
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