hand·wheel /ˈhæn(d)ˌ(h)wil/
操縱輪; 轉向盤
Hand·wheel n. Mach. Any wheel worked by hand; esp., one the rim of which serves as the handle by which a valve, car brake, or other part is adjusted.
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handwheel
n 1: a wheel worked by hand
2: control consisting of a wheel whose rim serves as the handle
by which a part is operated