Improvements in or relating to drill jigs for use with machine tools
摘要
<p>1,138,574. Jigs. ROLLS-ROYCE Ltd. 19 Oct., 1967, No. 47549/67. Heading B3C. A drill jig comprises a block 13 slidably mounted on a base 12, liner and slip bushes 16, 17, and passages 19-21 for supplying coolants to the drill 18.</p>
