| |||
| 矩形井网 | |||
| 正常航线; 矩形型 | |||
|
rectangular pattern : 13 phrases in 6 subjects |
| Agriculture | 1 |
| Geography | 1 |
| Oil / petroleum | 2 |
| Technology | 6 |
| Telecommunications | 1 |
| Textile industry | 2 |
| |||
| 矩形井网 | |||
| 正常航线; 矩形型 | |||
|
rectangular pattern : 13 phrases in 6 subjects |
| Agriculture | 1 |
| Geography | 1 |
| Oil / petroleum | 2 |
| Technology | 6 |
| Telecommunications | 1 |
| Textile industry | 2 |