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The newly designed drill entirely eliminated and remified these disadvantages. By adding
support holders on the drill bits, this enhanced the stability of the drill bits. The holders cover
and protect the drill bits, which makes the drilling process safer and more efficient. In addition,
this self-contained compartment collects dusts thus protecting the operator and decreasing
the rate of accidents. This break-through in the drilling process with the push-and-pull pressure
control operating method together with an adjustable handel enhances user experience
with greater safety and personalization.
YE Feng ZHUANG Yuehua