unit development
| folder
| unit development | |
| oil | 联合开发 |
| folder | |
| gen. | 文书夹 |
| exhib. | 文件夹 |
| hydroel.st. | 案卷夹，文件夹; 案卷夹 |
| interntl.trade. | 折叠式说明书 |
| met. | 断裂试验仪; 折叠机; 卷边机 |
| sport. | 传单 |
| tech. | 纸夹 |
| |||
| 联合开发 | |||
|
unit development : 32 phrases in 13 subjects |
| Aviation | 5 |
| Chemistry | 1 |
| Earth sciences | 1 |
| Electric machinery | 1 |
| Electronics | 2 |
| General | 2 |
| Law | 2 |
| Management | 1 |
| Name of organization | 4 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 4 |
| United Nations | 6 |