In view of some disadvantage factors,in the railway conservation of that the motor-driven vibration machines in our country subsist, a new type of efficient, safety and reliable vibration of portable internal combustion vibrator, BDG-I, is developed.

This article elaborated BDJ - 1 type portable diesel-driven tamper development project, the main technical parameter and the operating procedure.

Electromagnetic shielding design of military portable reinforced computer;

Based on the Windows environment and implemented with MCGS and Visual Basic,the automatic data sampling and processing system for scaling performance curve of portable fan was introduced.