| 摘要 |
<p>The device (10) has a lower envelope (22) and an upper envelope (23) forming a casing for gripping by a user. A jack outlet (95) is provided at one end of the device for connecting the device to an electric power source, and a heat engraving unit is provided at the other end of the device. The heat engraving unit includes a resistive wire (122) made of copper, brass or alloy of nickel and chromium. The jack outlet is connected to an electronic printed circuit board (80) accommodated in the casing of the device.</p> |
