 |
| |||
| back boxing; backer board; backing board; back lining | |||
| 背衬板: 14 phrases in 3 subjects |
| Automobiles | 1 |
| Metallurgy | 3 |
| Technology | 10 |
|
| |||
| back boxing; backer board; backing board; back lining | |||
| 背衬板: 14 phrases in 3 subjects |
| Automobiles | 1 |
| Metallurgy | 3 |
| Technology | 10 |