For some printer printing and copying machines, write a printer specification using steps: Print copiers use common machines, so there are generally the following types:1.The color is abnormal, 2. Paper jam 3, No printing content In order to improve efficiency and reduce waste, we should check......
Read MoreRfid (radio frequency identification) is a wireless communication technology that can identify targets and read and write related data through radio signals without establishing mechanical or optical contact between the identification system and the target. The rfid reader-writer communicates wirele......
Read MoreThe SIM card is used to replace the conventional IC card through the mobile phone card in the mobile phone. First, the user reads the card in the card reader through the SIM card in the mobile phone. The card reader passes the information to the POS terminal through recognition, and the POS terminal......
Read MoreAfter the portable label machine is connected to Bluetooth, the label content can be set directly through the mobile phone APP. This method is more convenient than the keyboard input method and more flexible than the computer input method, so it is widely used.
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