Home / Standards / GB/T 20662-2006 GB/T 20662-2006 Active Petroleum and natural gas industries - Classification and conformity assessment of products processes and services 石油天然气工业 产品、过程和服务的分级与合格评定 Standard Type GBT ICS N/A CCS E04 Status 现行 Issue Date 2006-12-15 Implementation 2007-05-01 Responsible Dept 国家标准委 Drafting Unit N/A