Double stroke gas spring wall bed

1. Double rod hydraulic cylinder
Hydraulic cylinder fixation - solid double rod: the spatial position is three times the effective stroke.
Fixed piston rod - hollow double rod: the spatial position is twice the effective stroke.
2. Single rod hydraulic cylinder
(1) There is no oil inlet in the rod chamber, and there is oil return in the rod chamber.
(2) There is oil inlet from the rod chamber, but there is no oil return from the rod chamber.
(3) Differential connection - the left and right chambers are connected and both are supplied with pressure oil