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在技术可行的情况下，应始终使用无线电或表面位置参考。
if it is technically feasible, a radio or surface position reference should always be used.
Last Update: 2015-03-25
Usage Frequency: 1
Quality:
应始终开启“自动碎片整理”功能，以保持最佳性能。
you should turn on automatic defragmentation and allow it to run full time for maximum performance.
Last Update: 2006-11-24
Usage Frequency: 5
Quality:
