Glossary D
Digital command control has something to do with the method of controlling multiple trains and accessories using digital communications packets to send commands.
Diffraction is identified as the phenomenon of light that occurs when light passing through a narrow aperture bends when it passes around an edge.
Differential gear is defined as a bevel gear that permits rotation of two shafts at different speeds.
Dyes are characterized as a synthetic or natural organic chemicals that are soluble in most common solvents. Characterized by good transparency, high tinctorial strength, and low specific gravity.