深部磨牙残根用根挺的英文

elevator for deeply seated molar stumps

• 深:    deep
• 部:    part; section; div ...
• 磨牙:    grind one's teeth ...
• 残:    incomplete; defici ...
• 根:    root
• 用:    40分钟跑完全程 run the c ...
• 挺:    stick out; bulge o ...