blade back叶片: blade vane; blade; paddle; l ...背: body's back弧: arc bow叶片背弧侧: convex side of blade叶片背弧型面: convex profile下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:叶片背弧，即可在微信中查询翻译
