Home / Standards / GB/T 20661-2006 GB/T 20661-2006 Abolished Petroleum and natural gas industries - Flexible pipe systems for subsea and marine riser applications 石油和天然气工业 用于海底和海洋立管的挠性管系统 Standard Type GBT ICS 75.180.10 CCS E94 Status 废止 Issue Date 2006-12-15 Implementation 2007-05-01 Responsible Dept 国家标准委 Drafting Unit N/A