Assertion: gyroscope's axis | /r/HasProperty | through the centre of the ring
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Source sentences:
text: These actuate or ‘drive’ the ring into its Cos2θ mode of vibration at resonance (like rubbing a wet finger on a wine glass causing it to ‘ring’) or detect radial motion of the ring perimeter either caused by the primary drive actuator or by the Coriolis force effect when the gyro is rotating about its sensing axis, which is through the centre of the ring.