| |||
| 复零〔归零制〕记录 | |||
| 归零制记录 | |||
| 归零记录 | |||
| 归零制记录; 复零记录 | |||
| 归零制磁记录 | |||
| |||
| 归零制记录 | |||
| 归零记录 | |||
| 归零制记录; 复零记录 | |||
|
return-to -zero recording : 29 phrases in 9 subjects |
| Agriculture | 1 |
| Computers | 1 |
| Earth sciences | 1 |
| Economics | 1 |
| Electronics | 2 |
| Information technology | 11 |
| Space | 2 |
| Technology | 9 |
| Telecommunications | 1 |