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Seismic Detection of Motor Vehicles.

机译:机动车辆的地震检测。

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The technical feasibility of detecting the approach of motor vehicles by seismic means was determined by the recording and analysis of road vibration,and verified by the construction of a seismic switch which was reliably triggered at a distance of 50metres (164ft) along the pavement by vehicles travelling at 50km/h (30mph).

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