user volume
| header label
| user volume | |
| tech. | 用户卷宗 |
| header label | |
| agric. | 头部标号 |
| dat.proc. | 首标 |
| econ. | 要点标签; 标题标签 |
| oil | 磁带头标号 |
| |||
| 用户卷宗 | |||
|
user volume : 3 phrases in 1 subject |
| Electronics | 3 |