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摆锤
bob
[仪] pendulum bob
[仪] pendulum bob
- 在实验中这个环做为扭摆的摆锤，从一个旋转平台垂下而来回扭转。
The ring is used as the bob in a torsion pendulum, which twists back and forth while suspended from a mounting on a rotating platform. - 摆锤W装在一根杆上，在轴A周围垂直移动，它由螺旋弹簧F所悬挂。
W is attached to a bar, movable vertically around an axis A and suspended by the helical spring F. - 螺母沿着金属螺纹移动得相当慢，因此我们就很容易地把摆锤固定在准确的位置上。
The nut moves quite slowly along the thread in the metal, and so we can easily find the exact place for the bob.
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