The main stretcher made of high quality aluminum materials.
High stretcher alloy aluminum materials for the track, to increase steady and reliability.
The two single-stretcher can be lift up or down easily. Two single-stretchers can be connecting at the same level. The bed frame can move on the 2 stretchers.
At the bed slide o any single stretcher can be locked automatically; and has a insurance equipment.
Central control braking system in every single-stretcher, reliable and steady during the movement or connection.