nitruration
| douce
| nitruration | |
| industr. | nitriding |
| douce | |
| social.sc. | boo; hagga; snop; bash; grass; hay |
| |||
| nitriding | |||
| nitrogen hardening; ammonia hardening | |||
|
nitruration : 36 phrases in 5 subjects |
| Chemistry | 1 |
| Earth sciences | 1 |
| Gear train | 1 |
| Metallurgy | 29 |
| Thermal Energy | 4 |