BAK - Disamat 801 Hot Air Welding Machine. BAK - Disamat 801 The welding machine for â¦more
The different grades of the Risser sign give a measure of bone maturity and thus of the skeletal growth to be expected. In Europe, a scale ranging from Risser 0 to Risser 5 defines the grades from beginning ossification to complete fusion of the apophysis to the iliac bone. In the USA, 4 grades are defined.
Reference Scale (M:R Scale) It is the ratio of master units in the active model to the master units in reference model. When sheet is at full scale (Full Size 1=1) and the design model is being scaled down, it is important to scale it by appropriate reference scale factor so as to fit within sheet boundary.