Terms containing back of blade

Subject	English	Chinese
nautic., tech.	back of blade	叶背
el., tools	The inspection certificate states that the blades of the electric scrapers were found rusty when they were unpacked and the photos taken on the spot could back up the findings	检验说明书表示，开箱时发现电动刮刀的刀片已生锈，现场拍的这些照片能作证