Hardware Abstraction Layer has three models of internal communication, virtual driver and equipment management.
硬件抽象层共分为内部通信模块、虚拟驱动模块和设备管理模块三部分。
In the driver layer, including the system hardware printers, CUP equipment, communications equipment, etc. drivers.
在驱动层包括了系统硬件打印机，银联设备、通联设备等驱动程序。
In the driver layer, including the system hardware printers, CUP equipment, communications equipment, etc. drivers.
在驱动层包括了系统硬件打印机，银联设备、通联设备等驱动程序。
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