In another aspect of the present invention, a multiple fluid pressure control system is disclosed having a fluid reservoir, a source of pressurized fluid connected to the fluid reservoir, {HEAD ~ a fluid supply line} including a downstream conduit and an upstream conduit wherein the upstream conduit is connected between the source and the downstream conduit, and a flow restricting means disposed between the upstream and downstream conduits for restricting fluid flow in the fluid supply line and thereby establishing a preselected difference in fluid pressures in {TAIL ~ the upstream and downstream conduits} 
In another aspect of the present invention , a multiple fluid pressure control system is disclosed having a fluid reservoir , a source of pressurized fluid connected to the fluid reservoir , { HEAD ~ a fluid supply line } including a downstream conduit and an upstream conduit wherein the upstream conduit is connected between the source and the downstream conduit , and a flow restricting means disposed between the upstream and downstream conduits for restricting fluid flow in the fluid supply line and thereby establishing a preselected difference in fluid pressures in { TAIL ~ the upstream and downstream conduits }
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