According to the working principal of the vacuum fixed type vacuum belt filter,we draw out calculating formula of the drive power and the tension of the urbber belt.

Analysis of bearing force and driving power calculation of three rollers veneer reeling machine of symmetrical type;

Calculation of driving drag torque and driving power for mixing drum of cement concrete transfer vehicles;

Super-high fire rate external power Gatling gun needs a huge of driving power,and it has the problem of weapon applicability.

This paper introduces the calculation method for pushing power of crawlertraveling unit of spreader,and gives some keeping regulations for taking motors according to actual design and working experience.