| 单词 | wheel and axle |
| 释义 | wheel and axle in British Englishnoun a simple machine for raising weights in which a rope unwinding from a wheel is wound onto a cylindrical drum or shaft coaxial with or joined to the wheel to provide mechanical advantage wheel and axle in American English a larger wheel or pulley that is fixed to a shaft, a smaller wheel or pulley, or a drum, to increase mechanicaladvantage or speed: the wheels are often grooved and operated like pulleys |
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