 |
| |||
| ball and socket joint; ball joint connector | |||
| ball and socket; ball pivot | |||
| ball-and-socket joint; ball pin | |||
| knee cap; patella; kneecap (patella, scutum genu); kneepan (patella, scutum genu); whirl bone (patella, scutum genu); rotula (patella) | |||
| hinge, joint link, butt hinge | |||
| swivel; spherical joint; ball joint; knee joint | |||
| ball; knuckle; ball-joint | |||
| hinge | |||
|
rotule : 150 短语, 16 学科 |
| 一般 | 1 |
| 信息技术 | 3 |
| 农业 | 1 |
| 医疗器械 | 2 |
| 医疗的 | 26 |
| 地球科学 | 2 |
| 建造 | 6 |
| 技术 | 5 |
| 文化学习 | 1 |
| 机械工程 | 69 |
| 电子产品 | 1 |
| 科学的 | 2 |
| 行业 | 2 |
| 运动的 | 1 |
| 运输 | 27 |
| 非正式的 | 1 |