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Always the same stuck in a rut hole machine design, with the concept of innovation designed a hole machine, easy control of the distance between holes and hole, the transparent cover,make the position of the hole out clear.
Design of transparent hole, pointed directly at the location of the hole, zero error.Under cover, increased the feet, so that you can master the distance between holes and hole.
In general cm and mm, can measure out the correct position.
Cap is curved, up and down on the table will not fall over.