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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
avia.
Omega system
(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)
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