Tesla measured these electrostatic emissions with a particular partially evacuatedtube which he could orient as desired and watch the wave patterns change shape.
特斯拉用特制的排空管来测量这些静电排放物，他可以随心所欲地调节和观察波形的变化。
2
CATHODE RAY tube, An evacuated glass tube with a viewing screen, used for displaying information.
阴极射线管，一个具有显象屏幕的真空玻璃管。用于显示信息。
3
Instantaneous efficiency curves for both single evacuatedtube and complete evacuated tubular collector are also tested.