pilot balloon [气象] 测风气球 ; 导航气球 ; 测风向气球

pilot balloon theodolite 测风经纬仪 ; 测风气球经纬仪

pilot balloon observation 测风气球观测

pilot-balloon plotting board [气象] 测风绘图板

radio pilot balloon 无线电测风气球 ; 无线电控制气球

pilot balloon plotting board 测风气球绘图板

pilot balloon ascent 测风气球施放

pilot balloon station 气球测风站

pilot balloon slide-rule 气球测风计算尺

pilot balloon self-recording theodolite 测风气球自记经纬仪