他们利用特殊设备向一只十字园蛛的蛛网上发出激光脉冲，然后他们利用激光测量这种传遍蛛网的微小振动。
They used special equipment to send out laser pulses into the web of a garden cross spider. Then they used a laser to measure the very small vibrations, which spread through the web.
提出了不同设备振动测量参数的选择方法。
The selecting methods of vibration measuring parameters of different equipments is put forward.
高精度的振动台配备电子控制和测量装置。用于测试精密机械和电子设备机械强度。
Precision vibrating tables equipped with elec-tronic control and measuring systems are used for mechanical strength testing of precision mechanical and electronic equipment.
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