这种打印机工作方式是选择性地加热热敏纸区域，热敏纸含有化学成分，当它接触到热的打印头时会改变颜色。

These printers work by selectively heating regions of heat-sensitive paper that is infused with a chemical that changes color when it comes in contact with the heated print head.

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此系统由程序接触器、自制的时刻比对自动转换器、时间间隔计数器和数字打印机组成。

The system consists of a programme contactor, a automatic transfer device which was completely designed and built by ourselves, a time interval counter and a digital recoder.

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