| 摘要 |
The device for manoeuvring industrial taps, by a quarter of a turn according to the invention, is constituted by a square bit drive 2, which comprises at its base two stops 5 bearing two balls 6, which move on the internal wall of a sector 9 which covers the base of the square bit drive 2, which is positioned via its hollow 12 and is manoeuvred by the holes 3. <IMAGE>
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