外特网和内特网在有很多共同之处的同时，两者间的一个主要差别是，在外特网中有些使用该系统的单位不受企业的控制。
While extranets and intranets have a lot in common, the main difference between the two is that in the case of extranets, some parties using the system are out of the enterprise's control.
涉及的嵌入式网络化装置是一个具有以太网接口的分布式输入输出装置，主要应用于工业自动化控制领域，对大型设备实施远程监控。
The embedded network device resarched is a distributed I/O device which has an ethernet interface, it is applied mainly in industrial automatic control field to monitor heavy-duty equipments remotely.
本文主要阐述了基于工业以太网的恒压供水控制系统的设计过程。
This paper describes the process of establishment about Constant-pressure supplying water control system based on the Industrial Ethernet.
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