Basing on the analysis and experiment of transporting chain board and Vegetables dropping,a new sweeping mechanism is made,which is used to solving the question about Vegetables dropping and the quality of Vegetables drying.

To reveal the relation between them, a dynamic model of scan device was established, inwhich the influence of the rigidity of transmission mechanism and viscous damp are considered.

Using and analysis of common belt conveyor cleaning device;

A magnetic signature minesweeping device comprising a water driven turbine power generator and a superconducting material magnet,wherein the turbine power generator is arranged,in use,to supply a driving current for the superconducting magnet when the minesweeping device is towed through the water.

A brief introduction of application and functions of the purging units in the coal chemical industry,the selection of two control modes for the purging units and the design consideration of purging flowrate for different operating conditions are introduced.

The special scanning device to fix the probe is designed .