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.
Other similar scales can be used to measure the intensity like the EMS scale, MSK scale, INQUA scale and Shindo scale. The two scales that are more commonly used in America are the Richter and Mercalli scales. Historically, the Mercalli is an earlier scale which dates back to the 19th century. It was later modified by an Italian volcanologist named Giuseppe Mercalli in the early 1990s.