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| actuator | |||
| engine A machine in which power is applied to do work by the conversion of various forms of energy into mechanical force and motion; motor | |||
| engine | |||
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| engines; motors; motors and engines; motors and engines except for land vehicles | |||
| motor: 520 短语, 20 学科 |
| 一般 | 41 |
| 专利 | 8 |
| 信息技术 | 3 |
| 养鱼（养鱼） | 2 |
| 农业 | 8 |
| 冶金 | 5 |
| 化学 | 5 |
| 医疗的 | 2 |
| 地球科学 | 8 |
| 技术 | 4 |
| 机械工程 | 201 |
| 材料科学 | 2 |
| 环境 | 8 |
| 电子产品 | 12 |
| 统计数据 | 7 |
| 能源行业 | 2 |
| 自然科学 | 7 |
| 行业 | 10 |
| 运输 | 184 |
| 通讯 | 1 |