“approach control”的概念、定义、翻译、参考文献-科学参考

单词	approach control
释义	approach control [ǝ`prōch kǝn´trōl] ^NAVIGATION A radio guidance service for aircraft within 10 to 20 miles (16 to 32 kilometers) of their destination airport that provides steering vectors and speed values to properly place the aircraft for entry into the airport traffic pattern and to provide safe spacing from neighboring aircraft.
随便看	memory cycle memory dump memory dump routine memory element memory expansion card memory fill memory gap memory guard memory hierarchy memory lockout register memory management memory map memory map list memory mapping memory overlay memory port memory power memory print memory printout memory protect memory protection memory-reference instruction memory register memory search routine memory-segmentation control

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