短語(yǔ)詞組短語(yǔ)single post type traffic sign 單柱式交通標(biāo)志double post type traffic sign 雙柱式交通標(biāo)志tri -post type traffic sign 三柱式交通標(biāo)志traffic sign post 交通標(biāo)志牌柱 返回 post traffic sign