Home / Standards / GB/T 18851-2002 GB/T 18851-2002 Abolished Non-destructive testing--Penetrant testing--Reference test blocks 无损检测 渗透检验 标准试块 Standard Type GBT ICS 19.100 CCS J04 Status 废止 Issue Date 2002-10-11 Implementation 2003-05-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委