DB37/T 4509-2022
Mine explosion-proof door (explosion-proof manhole cover) safety inspection technical specification (English Version)
- Standard No.
- DB37/T 4509-2022
- Language
- Chinese, Available in English version
- Release Date
- 2022
- Published By
- Shandong Provincial Standard of the People's Republic of China
- Latest
- DB37/T 4509-2022
DB37/T 4509-2022 history
- 2022 DB37/T 4509-2022 Mine explosion-proof door (explosion-proof manhole cover) safety inspection technical specification
