Home / Standards / GB/T 31945-2015 GB/T 31945-2015 Active Steel plate for self-elevating drilling units leg structure 自升式平台桩腿用钢板 Standard Type GBT ICS 77.140.50 CCS H46 Status 现行 Issue Date 2015-09-11 Implementation 2016-06-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会