Hydraulic fluid power -- Electrically modulated hydraulic control valves -- Part 1: Test methods for four-port directional flow-control valves— 40 стр.
Hydraulic fluid power -- Electrically modulated hydraulic control valves -- Part 2: Test methods for three-port directional flow-control valves— 38 стр.
Fluid power systems and components -- Graphical symbols and circuit diagrams -- Part 1: Graphical symbols for conventional use and data-processing applications -- Amendment 1— 8 стр.
