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.
其次以TI公司DM642数字信号处理器为基础，介绍了其特有的数字视频口，该视频口是一种双向，高速的并行处理接口。
Then based on the digital signal processor DM642 of TI company, the paper introduces its own digital port. The video port is a bidirectional, high-speed and parallel processing port.
配有上下双向旋转刀盘，一次性即可完成对钢板的上下坡口；
Equipped with two-way rotating knife dish up and down, one-time can complete the of the steel plate on the downhill mouth;
配有上下双向旋转刀盘，一次性即可完成对钢板的上下坡口；
Equipped with two-way rotating knife dish up and down, one-time can complete the of the steel plate on the downhill mouth;
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