| 单词 | virtual PPI reflectoscope |
| 释义 | virtual PPI reflectoscope [`vǝr·chǝ·wǝl ¦pē¦pē`ī ri`flek·tǝ´skōp] ENGINEERING A device for superimposing a virtual image of a chart on a plan position indicator (PPI) pattern; the chart is usually prepared with white lines on a black background to the scale of the plan position indicator range scale. |
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