| 摘要 |
A master jaw chuck for machine tools including a guide plate attachable to a machine tool spindle, a key plate positioned rearwardly of the guide plate, master jaws positioned forwardly of the guide plate, spacer means between the key plate and the master jaws for spacing the key plate from the master jaws, fastener means passing through the spacer means for securing the key plate means to the master jaws and means operating against the master jaws for radially moving the master jaws, the spacer means, and the key plate.
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