The background of development of the compact bearings for railway freight cars,the designed structure of compact bearings in our country and the advanced bearings technology abroad are analyzed and described briefly.

The Development Request of Compact Resident District and Adjustment Measures;

Calculation of power frequency electric field intensity of ultrahigh voltage compact transmission lines;

Designing for the Compact Transmission Line;

The accomplishment and its application information of modern power network switch technology were introduced, and the design idea and an example of compact type substation were elaborated.

Based on Shenmu-Xinzhou-Shibei 500 kV compact type transmission line project the paper discusses about the technical conditions for design and gives out a design solution for 500 kV compact type suspension small angle towers with economical comparison.

compact type and to meet the requirements of environment for high-voltage electrical appliance assemblies are the trends of power transmission and distribution.

A study on the grain filling physiological characteristics of different tight plant type corn hybrids was conductied in 1997 1998.

Innovation in Medium-height Compactness and Semicompactness Summer Millet New Germplasm and Its Application in Breeding;