| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to know a serial number from the outside when needed without any mind about the staining or peeling of a seal. SOLUTION: This communication terminal device is provided with a barcode reader connecting part 13a, a barcode reader 23 is connected to the barcode reader 13a when manufactured, the barcode reader 23 reads a barcode 22 stuck to the outer wall of a main body 21a and the serial number is stored. When a request for the serial number is received from the outside, the serial number is transmitted.
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