The seismic source USES the rotation of centrifugal quality to produce seismic energy. The produced sweep signals are recorded by clockwise and counterclockwiserotation at each source point.
这种地震震源采用离心质量旋转地震能量,在每个震源点记录下顺时针转动和逆时针转动所产生的扫描信号。
2
About two thirds of viewers were able to reverse the direction of rotation from clockwise to counter-clockwise or vice-versa.
If you saw the figure spinning counter-clockwise first, then you were significantly more likely to be able to reverse the direction of rotation than if you saw it spinning clockwise first.