This is article introducing manufacturing process of pressed cylindrical shell thick half of steam drum for utility boiler,creatively presenting measurement on decreasing longitudinal seam technical tolerance of thick half,as a result,the material utility rate of the drum is improved.

This paper discuss the shell tile score,autogenously cutting,heat department,pressed molding,measure,partnership,longitudinal seam machining,and the setting.

In order to improve the efficiency of the system, the tile and double cache technology was introduced with vector and raster integrated map service.

Tile laying on the surface with a high position,a steep slope and a complex spatial shape,is difficult to the measurement,lofting and cutting of the tiles.

The clinical research of scalp epidermal skin graft inhibit scar hypertrophy on intermediate split thickness skin graft donor Site;