The subject innovation is the surface with the contact surface of the base to the slider (SLIDER) constituting the pressing (press) machine installed, in particular cylindrical perpendicular reference gauge relates to a cylindrical perpendicular reference gauge (gauge) to check the vertical position to move reciprocally up and down By minimizing it is to minimize the error of the vertical cylindrical perpendicular reference gauge generated by a surface roughness state of the surface plate.; In order to achieve this object of the present invention comprises a bolt (bolt) attached to the bolt hole and the bolt hole formed in the flange of the cylindrical perpendicular reference gauge.
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