1.
A Comparative Study of PDH、SDH and SONET Technologies
准同步数字系列、同步数字系列、同步光纤网的技术比较及互通
2.
Implementation method of a core SONET/SDH switch with high capacity
同步光网络和同步数字系列大容量交叉的实现
3.
Code for construction of SDH project of railway optical fiber cable communication
铁路光缆通信同步数字系列工程施工规范
4.
Temporary regulation for design of synchronous digital hierarchy(SDH)microwave relay telecommunication system engineering
同步数字系列（SDH）微波接力通信系统工程设计暂行规定
5.
Temporary regulation for design of SDH long-distance optical fibre cable transmission project
同步数字系列（SDH）长途光缆传输工程设计暂行规定
6.
Temporary regulation for acceptance SDH equipments installation of optical fibre cable transmission project
同步数字系列（SDH）光缆传输设计安装工程验收暂行规定
7.
Study of a New-Type Digital Synchronous Valve and Its Application to Synchronous System;
新型数字同步阀及其在同步系统中的应用研究
8.
Realization of Spread Spectrum Sequence Synchronization by Digital Method in Radio Receiver;
无线接收机中扩频序列同步的数字化实现
9.
Frame structure for synchronous digital hierarchy signal
GB/T15409-1994同步数字体系信号的帧结构
10.
Synchronous digital hierarchy bit rates
GB/T14731-1993同步数字体系的比特率
11.
The Research on Digital Control System of Permanent Magnet Synchronization Motor;
永磁同步电动机数字化控制系统研究
12.
Research on Digital Drive System of Permanent Magnet Synchronous Motor;
永磁同步电动机数字化驱动系统研究
13.
A Brief Discussion on the Net Synchronization of Radio & Television Digital Communication System
浅谈广播电视数字通信系统的网同步
14.
Realization of Digital Permanent Magnet Synchronous Motor Control System
永磁同步电机控制系统全数字化实现
15.
Methods of measurement for synchronous digital hierarchy(SDH)optical fiber cable line systems
GB/T16814-1997同步数字体系（SDH）光缆线路系统测试方法
16.
Requirements for synchronous digital hierarchy (SDH) optical fiber cable line systems of national public telecommunication network
GB/T15941-1995同步数字体系(SDH)光缆线路系统进网要求
17.
Study of Control Strategies of Position Synchronous System Using New-Type Digital Synchronous Valve;
基于新型数字同步阀位置同步系统控制策略的研究
18.
digital-selsyn converter
数字自同步机转换器