測風氣球 cèfēngqìqiú pilot balloon Definitions Defs Origin Strokes Stroke Words Sentences Sents 测风气球 測風氣球 cèfēngqìqiú pilot balloon A balloon used to observe upper-air wind direction by tracking it from the ground with a theodolite.
测风气球 測風氣球 cèfēngqìqiú pilot balloon A balloon used to observe upper-air wind direction by tracking it from the ground with a theodolite.
