gb+21448
gb+21448, Total:2 items.
The international standard classification for "gb+21448" includes: Petroleum products and natural gas handling equipment .
The Chinese standard classification for "gb+21448" includes: Oil and gas gathering and transportation equipment .
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
- GB/T 21448-2017 Specification of cathodic protection for underground steel pipelines
- GB/T 21448-2008 Specification of cathodic protection for underground steel pipelines
