Topic
| Code | 20000221 |
|---|---|
| Name | inorganic chemical |
| Description | The branch of chemistry dealing with minerals and metals |
| Lft | 134 |
| Lvl | 3 |
| Rgt | 135 |
| Code | 20000221 |
|---|---|
| Name | inorganic chemical |
| Description | The branch of chemistry dealing with minerals and metals |
| Lft | 134 |
| Lvl | 3 |
| Rgt | 135 |