A series of seismographs are arranged with their direction of vibration along the generators of a cone with vertical axis.

一组地震仪的振动方向是与具有垂直轴的锥体拾震器方向一致的。

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The ROHO Group of the US has developed air-inflated seat cushions which effectively reduce the vibration transmission in perpendicular direction and improve the seating comfort of drivers.

美国ROHO集团已经开发出一种车用充气座垫，可以有效减少垂直方向的振动传递，并且有效的提高驾驶员乘坐的舒适性。

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So find out the point whose stress is the maximal and Y is the direction of primary vibration.

确定了膜片的主振方向和受应力最大的点，为正交试验优化提供了计算依据。

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