-The national standard measurement unit for 8-level standard leak holes (helium gas) is used to measure and issue a verification certificate. The detection standard for leak detection rate of leak detectors can be divided into internal and external leak holes.
New and old products will be dispatched randomly
-8 magnitude standard leak holes (He)
National Standard Unit of Measurement and Certification
Standard for Detecting Leakage Rate of Leak Detector
Standard leak can be divided into: built-in, external.
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