 |
| |||
| cyanide-hardening; cyanide case-hardening; cyanidation hardening | |||
| cyanide hardening | |||
| 氰化硬化: 6 phrases in 3 subjects |
| Metallurgy | 3 |
| Space | 1 |
| Technology | 2 |
|
| |||
| cyanide-hardening; cyanide case-hardening; cyanidation hardening | |||
| cyanide hardening | |||
| 氰化硬化: 6 phrases in 3 subjects |
| Metallurgy | 3 |
| Space | 1 |
| Technology | 2 |