back of tool

• 刀背

back of tool的用法和样例：

例句

1. I remember that the most early practicality of shark head was appeared in Mongolia and strips in tumulus from Liao dynasty,its back has two shark apices!
   记起来了，最早鲨鱼头的实物是内蒙一辽代古墓出土的刀条，刀背是连续的两个鲨鱼峰！