| 摘要 |
<p>A casing (3) of a control unit of a body of a numerical control apparatus is provided at its front side with a display and an interface (2) into which a PC card (13) can be inserted. A dustproof mechanism (6) is also provided so as to prevent dust from entering the control unit from the outside through the interface (2) both when the PC card (13) is inserted into the interface (2) and when the PC card (13) is not inserted.</p> |
