정의: An elevator or lift is a machine that vertically transports people or freight between levels. They are typically powered by electric motors that drive traction cables and counterweight systems such as a hoist, although some pump hydraulic fluid to raise a cylindrical piston like a jack.
| 핵심 연구 분야 | Databases |
|---|---|
| 주요 연도 | 2022년 |
| 주요 연관 키워드 | elevator |
| 좋아요 수 | 0 |