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Tunnel construction and coal mine safety production have a bearing on people's lives and property safety.
The personnel management and positioning system such as the Duo Tunnel \ Site \ Mine is a new type of construction personnel access control, attendance and a positioning and safety management system.
Doo's "Smart Gas Station \ Gas Depot Management Card" is a product development based on Java technology system.
The bank card is a bank card with many functions, such as the ability to withdraw money, deposit, remittance, pay water and electricity fees, pay traffic fines, etc., on the same card ...
The intelligent card system of Doao Prison \ Detoxification Center integrates the life management of prisoners, supermarkets for prisoners, and basic medical care for prisoners, ...