This paper mainly discusses subjects such asprocessing,technology of pole coil wind ing,forming,manufacturing lead,punching,dove-tail groove,insulating,heat pr essing,encircling slot,etc.
Unique straight or spiral grooved feed bush with force cooling system and unique screw ensure high plastification in low temperature, high speed extrusion of material.
Regional mucoperiosteal flap with labiobuccal groove mucoperiost-eal flap can cover the bone grafting closely,it gives the alveolar bone a normalcontour and need not second vestibuloplasty.
It includes the division of dissolving area, the redetermination of its length and width,downhill layout of dissolving area a nd improvement of drilling tunnel and cutting grooves.
The paper introduces single "U" groove welding procedure for stainless steel inner cylinder of multilayer high pressure vessel,opening up a new method for welding clading stainless steel vessel.