民用建筑电气
electricity of civil building
civil building electricity
civil construction electrical engineering
民用煤气设备
domestic gas installation
民用用太阳电池
Solar Cells for Consumer Use
《国际民用航空公约》
the international civil aviation covenant
朝鲜人民民主主义共和国石油工业部石油地质研究院
petroleum geology institute
d. p. k. korea
城市居民用电
city residents’ energy consumption