| 摘要 |
<p>A suction board (9), for use with a sacrifice board and a process board during operation of a numerical control router, enables vacuum to be applied to a compartment which has been split into a plurality of portions (12a, 12b, 13a, 13b, 13c) associated with respective electromagnetic valves (15a, 15b, 18a, 18b, 18c), loss of suction being improved by the provision of at least one peripheral portion (12a, 12b) primarily intended for retaining the sacrifice board and at least one inner portion (13a, 13b, 13c) primarily intended for retaining the process board on the suction board. <IMAGE></p> |
