Home / Standards / GB/T 39209-2020 GB/T 39209-2020 Active Offshore platform rig heave compensating drawworks 海洋平台钻井升沉补偿绞车 Standard Type GBT ICS 47.020.20 CCS U35 Status 现行 Issue Date 2020-10-11 Implementation 2021-05-01 Responsible Dept 国家标准委 Drafting Unit N/A