| 单词 | envelope conditions |
| 释义 | > as lemmasenvelope conditions envelope conditions n. Aeronautics (see quot.). ΚΠ 1944 Jrnl. Royal Aeronaut. Soc. 48 117 Tests at other heights can then be confined to what are termed ‘envelope’ conditions; that is, the engine conditions which will give the maximum economy at any given speed. < as lemmas |
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