... 三臂分度规 three armed protractor 三角分度规 station pointer 三维分度规 three-dimensional protractor ...
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station-pointer fixing 三杆定位法
radar station pointer [雷达] 雷达站指示图
station-pointer fix 三杆定位法
pointer station 定位仪
station n pointer 三脚分度仪
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