DOUBLE surface - glider with upper and lower sail surfaces that enclose airframe to reduce drag and improve performance.
双翼面—滑翔机机架上下两面被翼布包裹，以减少阻力和提高性能。
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Lower the sail or the boat will be knocked down.
把帆放下来，否则船会被风吹翻的。
应用推荐
模块上移
模块下移
不移动