{HEAD ~ A terminal} comprising a PC type microcomputer, a display screen 25 and a keyboard 27 may furthermore be connected to the numerical control device 22 via {TAIL ~ a hard wired link}, for example of the RS232 type 
connected via
{ HEAD ~ A terminal } comprising a PC type microcomputer , a display screen 25 and a keyboard 27 may furthermore be connected to the numerical control device 22 via { TAIL ~ a hard wired link } , for example of the RS232 type
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH