Do these testing devices require inspection by a professional institution?
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Dear sea friends, may I ask whether vibration spectrum analyzers, valve internal leakage detectors, and underground pipeline leakage detectors need to be sent to testing institutions for inspection every year? Thank you
Could some expert please give me some advice? Thank you
If professional testing institutions are not used, how can the accuracy and reliability of the test data and results be ensured? How can trust be gained?