Based on pressing practical experience of EHA4120 double-faced clad plate elliptical head,the type head external surface clad layer crack reason during pressing process were analyzed and discussed,and the head pressing task was fulfilled successfully through improving the pressing procedure.
Based on the double-faced projection drawing of a space plane,this paper analyzes the relative position of the space plane to an observer,compares the coordinates of the two end points of a straightline segment and puts forward a method for visibility discrimination in the line-plane and plane-plane intersection problems.
Knitting features and influencing factors analysed and tested through experiment.Several samples of fabric construction established through repeated practice.Fabric designs of 2,3and 4 bars constructions mentioned.Quality double-faced terries obtained.
The following points are introduced in this article, such as characteristics of a newimitation plain velvet,its various typical structure diargams, the appearance index, andthe main parameters of velour cut process. The structure diagrams of jacquard, double-faced imitation plain velvet, etc., are treated as well.