A series of seismographs are arranged with their directionofvibration 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。
2
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.