Helicopters (True Books: Transportation)

Helicopters (True Books: Transportation)
出版社:Childrens Pr
出版時間:1997-04
頁數(shù):48
詞匯量:1363
AR:4.6
虛構:非虛構
ISBN:9780516203355
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Briefly describes the way a helicopter operates, different kinds of choppers, what the pilot does, and some of the work for which helicopters are used
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