Helicopters

ISBN: 9781429608282

作者: Martha E·H·Rustad

出版社: Capstone Pr Inc

页数: 32

定价: $ 29.37

装帧: SAL

内容简介

With a whir of rotating blades, helicopters hover effortlessly in the air. Learn how todays most advanced whirlybirds are used for everything from transportation to search and rescue missions. Discover how pilots fly helicopters all over the world.