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降低的最小垂直间隔
avia.
reduced vertical separation minimum
(在降低的最小垂直间隔过渡区域和最低导航性能规范 (MNPS)空域内的 RVSM认证的飞机之间,采用飞行高度层290以上1000 ft 的垂直间隔标准)
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