| 摘要 |
A self-reversing tapping attachment (10) comprises a tap holding spindle (30), a forward driver (50) with a detachably attachable drive element (54) and a reverse driver (74) with a detachably attachable drive element (54) to impart forward and reverse rotation, respectively, for the tap holding spindle (30), and subassemblies including gears (42, 44) and drivers (54).
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