OPC技术规范是OPC基金会制定的，它提供了统一的数据访问软硬件接口。
OPC technology specification is established by OPC foundation, which provides unitive data accessing software and hardware interface standard.
OPC技术规范是OPC基金会制定的，它提供了统一的数据访问软硬件接口。
OPC technology specification is established by OPC foundation, which provides unitive data accessing software and hardware interface standard.
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