double drum dryer英 [ˈdʌbl drʌm ˈdraɪə(r)]美 [ˈdʌbl drʌm ˈdraɪər]网络 双滚筒干燥器; 干燥机化学双语例句Double drum dryer with top-feed顶部加料式双滚筒干燥器