| 摘要 |
<p>A rotary coaxial air feed tube assembly (1) for a pneumatic chuck (13) with one end of the assembly screw coupled to the chuck and the other end of the assembly being coupled to a rotary air feed joint (3), keying means (9) being provided for coupling the feed tube assembly (1) to a rotary drive spindle (7) so as to impart a rotary drive to the assembly and to the chuck.</p> |
