The system includes a detector display having visual indicators arranged in a pattern representing a monitored area near the vehicle desired to be monitored. The system includes a navigation display showing an organizational model of a computer program that is formed by concentric rings representing levels of options within the computer program. A pipe end for guiding the writing lead to interlock with retreat and forward movement of the writing lead while the writing proceeds is arranged to move in the same direction, in conjunction with retreat and forward movement of the above-mentioned chuck.