-8量級(jí)的標(biāo)準(zhǔn)漏孔（氦氣）
國(guó)家標(biāo)準(zhǔn)計(jì)量單位計(jì)量并出具檢定證書(shū)
檢漏儀漏率的檢測(cè)標(biāo)準(zhǔn)
標(biāo)準(zhǔn)漏孔可分：內(nèi)置、外置。
-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.
