| 单词 | precision depth recorder |
| 释义 | precision depth recorder [prǝ`sizh·ǝn `depth ri´kȯrd·ǝr] ENGINEERING A machine that plots sonar depth soundings on electrosensitive paper; can plot variations in depth over a range of 400 fathoms (730 meters) on a paper 18.85 inches (47.9 centimeters) wide. Abbreviated PDR. Also known as precision graphic recorder (PGR). |
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