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['fri:'fɔ:l]  | |
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| 冶金 |
Freifall m |
| 建造 |
freier Fall des Betons in die Form; freie Fallhöhe des Betons |
| 机械工程, 建造 |
Ueberfallwehr n |
| 运输, 航空 |
freier Fall |
| 运输, 航空, 机械工程 |
Freifallausfahren n |
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| 技术 |
frei fallen |
| 核物理 |
преф. Freifall-; Freier Fall |
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| 文化学习 |
Freier Fall (Golding, 1959) |
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| 英语 词库 |
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| 军队, 后勤 |
Phase of the drop during which the paratrooper or the load falls because of his own weight. It ends when the parachute starts working (FRA); A parachute maneuver in which the parachute is opened, either manually or automatically, at a predetermined altitude. (FRA) |
| 缩写 |
ff |
| 美国 |
A parachute maneuver in which the parachute is manually activated at the discretion of the jumper or automatically at a preset altitude (JP 3-17) 亦见 airdrop, air movement, free drop, high velocity drop, low velocity drop |
