GB/T 31049-2014

Abolished

Top drive drilling equipment for oil drilling rigs

石油钻机顶部驱动钻井装置

Standard Type
GBT
ICS
75.180.10
CCS
E92
Status
废止
Issue Date
2014-12-22
Implementation
2015-10-01
Responsible Dept
国家标准委
Drafting Unit
N/A