Highway maintenance drilling is linear type hole site mark hole chi for operation

The utility model relates to a highway maintenance drilling is linear type hole site mark hole chi for operation, personally experience sth. Part of the body including the straightedge rule, chi body one side is provided with the scale, and the internal slip of chi is provided with two at least mark hole devices, and mark hole device includes that mark hole circle, symmetry are fixed in slider, the pointer of mark kong quan both sides, and pointer fixed connection lies in the slider of chi body scale one side, the internal ring groove that transversely is equipped with of chi, outwards extend respectively circle groove both sides has the spout, the circle groove forms crossing structure with the spout, be located the spout of chi body scale one side outside extend have with pointer matched with needle groove, a ring inslot is arranged in to mark hole circle, and slider sliding fit is in the spout of both sides, and the needle inslot is arranged in to the pointer, and mark hole circle, pointer are realized sti