Home / Standards / GBT 18851.1-2012 GBT 18851.1-2012 Non-destructive testing — Penetrant testing — Part 1: General principles 无损检测 渗透检测 第1部分：总则 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A