This paper introduces the main function of DWDM equipment, as well as the basic functions of wavelength router, and the implementation of wavelength router network control and management system in datails.

First,the paper presents conceptions,characteristics and structures of broadband metropolitan area networks,then presents main construction plan for broadband metropolitan area networks such as IP over ATM,IP over SDH,IP over WDM/DWDM,IP over RPR,IP over GE,IP over MSPP,finally presents the principle for construction plan and applications in the electric trades.

Analysls of tire equipment efficiency and discussion of improvement;

The important role of the modern clothing equipment in the manufacture of ready-made clothing;

The analysis and discussion of the consumption of energy for the continuously mixing equipment and the intermittence mixing equipment;

Facility Vibration Transmitting Principle and Measures to Avoiding Vibration in Refrigerating Plant Room;

Discussion of network frame and facility selection principles in Dalian urban network planning;

Brief introduction of craft and equipments for pig naked body before processing;

Application of Information for Overhauling Equipments Management;

Whole moving technique of Fully-mechanized mining equipments and its effect;