| English | eng-000 |
| direct-axis | |
| 普通话 | cmn-000 | 直轴 |
| 普通话 | cmn-000 | 纵轴 |
| 普通话 | cmn-000 | 顺轴 |
| English | eng-000 | axis of bank |
| English | eng-000 | d-axis |
| English | eng-000 | fore-and-aft axis |
| English | eng-000 | longitudinal axis |
| English | eng-000 | longitudinal shaft |
| English | eng-000 | straight axle |
| English | eng-000 | straight shaft |
| English | eng-000 | vertical axis |