管钻 meaning in English
pipe bit
tubing drill
tubular borer
tubular drill
Examples
- Nerve canal drill
神经根管钻 - 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。 - Under the function of big pressure and dynamic load , the grains may be moved which may cause the soil body distortion . at present , the relatively ripe methods of drill in gravel layer are mostly double - wall drill pipe reverse circulation drilling , auger stem breast wall drilling and down - the - hole hammer follow down drilling
论文根据jsl ? 30型砾石钻机潜孔锤同心跟管钻具结构,采用程序计算得到了钻杆内各深度处压力分布、钻头压力降、环形空间压力分布及空气流速分布。