GB/T 3639-2021

Active

Seamless cold-drawn or cold-rolled steel tubes for precision applications

冷拔或冷轧精密无缝钢管

Standard Type
GBT
ICS
77.140.75
CCS
H48
Status
现行
Issue Date
2021-08-20
Implementation
2022-03-01
Responsible Dept
中国钢铁工业协会
Drafting Unit
中国钢铁工业协会