| 单词 | echo box |
| 释义 | > as lemmasecho box echo box n. (see quot.). ΚΠ 1950 Gloss. Terms Radar (B.S.I.) 7 Echo box, a cavity resonator, having small damping, energized by pulses of energy radiated from a nearby aerial or by a probe in a waveguide. < as lemmas |
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