| 1. | 2 confirming one level , making position line 2确定一水平面,接拉好纵 |
| 2. | Position line by distance difference 距离差位置线 |
| 3. | Position line standard error 位置线标准误差 |
| 4. | Transfer of a position line 船位线转移 |
| 5. | Gradient of position line 位置线梯度 |
| 6. | Transferred position line 移动船位线 |
| 7. | Position line by distance 距离位置线 |
| 8. | Position line transferred 转移位置线 |
| 9. | Loran position line 罗远位置线 |
| 10. | 2 mark the position line at the bottom of baluster and use the level rule to make the balusters vertical 2先在小柱的底端根据图纸画出定位线,再将小柱用水平尺靠到垂直。 |