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| 欧米伽系统; 奥米伽导航系统; 欧米伽导航系统 一种甚低频、连续波、相位双曲线无线电导航系统。其工作频率段是10〜14 Hz,在全球范围内的导航精度可达 1.852〜3.704km (l〜2n mile) OTPV oil tank pressurizing valve 滑油箱增压阀 (在滑油箱通气系统中的单向阀，通常能够把滑油上的气体压力维持在3〜6psi 。这确保了在任何高度，滑油在正的压力下能供给到发动机驱动的滑油泵中) | |||
| 奥米伽系统 | |||
| Omega system: 21 phrases in 8 subjects |
| Aviation | 5 |
| Company name | 1 |
| Electronics | 1 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Shipbuilding | 1 |
| Space | 5 |
| Technology | 6 |
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