helical drill meaning in English
螺旋钻
Examples
- Methods : the root canal with root canal orifice burs and helical drilling bits were prepared in advance
方法：采用根管口台阶状车针与螺旋型根管钻组合起来扩大根管。 - Objective : to introduce a new prefabricated post - and - core system , a helical drilling bit and a prefabricated post - and - core consisting of a root canal orifice bur which was designed by the author
摘要目的：介绍一种由螺旋型根管钻、自行设计的根管口台阶状车针、预成桩核组成的预成桩核系统。