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.
A milliradian, simply called a mil or mrad (often capitalized MRAD), is an angular measurement which is defined as a thousandth of the radian ( = 0.001 radian), meaning that a full circle of 360Â° (degrees) corresponds to 2000*Ï or approximately 6283 milliradians.