The process of bra design in the underwear industry is studied. Several important aspects of the process were identified: sizing, fabric selection, pattern deve
The middle-convex and varying ellipse piston is th e key component of an internal-combustion engine. In general,the piston is mac hined by non-circular section
Development of complicated products is a project of system engineeringIt involves extensive and complicated knowledge,design meth ods and auxiliary technolog