They were able to measure the speed and direction of vehicles from ground vibrations.
这些节点可以从地面的振动测量出车辆的速度和方向。
Measure average wind speed by anemometer. Find out wind direction by light thread and compass.
用风速计量度平均风速，用一条轻的线和一个指南针找出风向。
Measure average wind speed by anemometer . Find out wind direction by light thread and compass.
用风速计量度平均风速，用一条轻的线和一个指南针找出风向。
How to measure the exact direction of Kaaba?
如何精确测量克尔白方向?。
An instrument used to measure the strength or direction of the Earth's magnetic field.
用来测量地球磁场强度和方向的仪器。
An instrument used to measure the strength or direction of the Earth's magnetic field.
用来测量地球磁场强度和方向的仪器。
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