There are differences on the principle of opening doors:
a single -winged swing door can only open outward (left or right); A double-leaf sliding door, a folding door can have from 2 to 6 wings, moves using rollers; A double -winged swing door can be made in two versions: open as outward or inside the cab; The sliding door, the most sealed, on the roller mechanism, does not require additional space; a rotary-sliding door, first pushes out of the cab, and then moves to the side, always goes complete with a shower cabin.
