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.
It is vibrating caulking forming by good quality binder.Good thermal conductivity,high compressive resistance,high anti-heat shocking ,unattackable,abrasion resistance,long service life.
The reasons forming abnormal formation pressure mainly includes digenesis, thermogenesis, biochemical action, tectonic action, dialysis, and fluid density difference action.
According to the origin,sand dust weather in Qingdao region is classified as outlandish drifting type,inlandish forming type and outlandish drifting-inlandish strengthening type.