写信日期是信头的必要组成部分。
信令协议是MPLS技术的重要组成部分，它的职责是在MPLS网络中建立一条相邻lsr间的信息传输通路。
As a critical part of MPLS technology, signaling protocol takes the responsibility to establish a data transmission path during adjacent LSRs in MPLS network.
装置集保护、控制、测量、遥信功能于一体，是变电站自动化系统的重要组成部分。
The protection combines the functions of protection, control, measurement and remote communication together to act as an important part in automation system of substation.
应用推荐