made of a hard, high-luster acrylic material with no markings. The keyboardlayout of the American stenotype machine is shown at the top / right. In "home
DIN 2137-2 DIN 2137-1 Keyboards for data and text input - Part 1: Germankeyboardlayout 现行 DIN 2137-2 Keyboards for data and text input - Part 2: Additional