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单词 walking wheel
释义

walking wheel

/ˈwɔːkɪŋ ˌwiːl/
noun
1An instrument consisting of a wheel with a handle by which it may be rolled along the ground to measure distances on foot; a measuring wheel.
2A large vertical wheel which is turned by people or animals walking on the inner or outer rim, used as a source of mechanical power; a treadwheel. Compare treadmill. Now historical.

Origin

Early 18th century. From walking + wheel.

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更新时间:2025/3/23 8:57:03