摘要 |
An automatic gauge for checking diameters of holes of a mechanical piece comprising plug gauges having protection nosepieces adapted to enter into the holes, a slide carrying the plug gauges, and a hydraulic device for displacing the slide; the contact between the nosepiece of a plug gauge and the piece, caused by errors in the machining or in the positioning of the piece, making a circuit which controls stopping of the slide for preventing the plug gauges from being damaged.
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