The operation principle of an extendable and retractable crash energy absorbing device was introduced.

The design of the buffer absorbing energy type in clined well catcher monitored by photoelectricity;

Electric locomotive longitudinal force and selection of buffers;

Research on Damp Based Overfall Buffer Used in Mine Hoist System;

By the quantitative analysis of over-wind fault, the importance of buffer in winding system is demonstrated.

In order to effectively reduce recoil force transferred from a type of automatic gun to carriage,it is necessary to set up the buffering device between receiver and cradle.

The conditions and contents of the new inspection,maintenance and operation code for coupler draft gears in the Russian Federal Railway are described.

Described are the development process,structure features and operation of the railway coupler draft gears in U.

In light of such special conditions as the line,traction mode on the section between Baoji and Qinling on Baocheng Line,the traction conditions of locomotives running on the section with steep slope to the north of Qinling Mountain,as well as the harm to draft gears are analyzed and introduced.