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Electric drill is a kind of commonly used tools.However, we always encounter a lot of problems when we use it .For example: it is difficult to vertical drilling, drilling depth is difficult to grasp, electric drill bit's temperature is too high or it is easy to produce spark etc..This manual electric drill is integrated with multiple functions of punching vertically ,measuring and watering.It can effectively solve these problems,and make your work easier and more efficient.
Dalian Minzu University
Dalian Nationalities University