可解除型IC卡，作为钥匙使用，内部是可编程的eepom空间，可配合相应的读卡器进行擦写或读取，该文件即为读写文件的程序，控制整个仪器的工作时间-Type IC cards can be lifted as a key, the internal programmable eepom space, erase or read with the appropriate card reader, the file is a program of reading and writing files, c