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
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