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| minimum obstruction clearance altitude; minimum obstacle obstruction clearance altitude; minimum obstacle clearance altitude (甚高频全向无线电信标 (VOR )航路、离航路航线或者航线段能够满足障碍间隔要求，且确保只有 VOR 就能得到可接受的导航信号覆盖范围。) | |||
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