NB/T 51031-2015
(Airborne interferoMetric synthetic aperture radar (InSAR) systems measure made 1: 10 000 1: 50 000 digital elevation model digital orthophoto DLG technical specification image maps Digital Line) 机载干涉合成孔径雷达(insar)系统测制1:10 000 1:50 000 数字高程模型 数字正射影像图 数字线划图技术规程 |
NB/T 42049-2015
Metal-oxide surge arresters without gaps for d.c. systems of 3kV and below 3kv及以下直流系统用无间隙金属氧化物避雷器 |
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