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Increase in the drill body through
the bracket means to improve the stability of the drill. Structure will be built-in retractable stand the greatest
extent possible from the drill body to absorb the shock, reducing vibration transfer to the hands to improve
the controllability of its operation.Three-point fixation of the stent can not directly exposed to drill, so
that the safety of the drilling process more effective, reducing the difficulty of the construction process.
Ensure the safety of ordinary users.
YE Feng ZHUANG Yuehua