凸耳式阀门应该有能力在全压力下提供双向“终端应用”，不需要下游蒸汽无口法兰。
Lug style valves shall be capable of providing bidirectional "Dead End Service" at full pressure without the need for down stream blind flange.
增强型并行口接口协议解决了PC与数据采集系统间的高速双向数据通信问题。
EPP is an answer to the problem of high speed, bi directional data communication between PC and data collection and conditioning system.
EPP是双向数据传输的增强并行口协议，速度较高，扩展方便，手提电脑均支持。
EPP is a bi directional data communication protocol of enhanced parallel port, it has performances of high speed and easy extensibility, which is provided by luggable computer.
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