Hydraulic power units; hydraulic power packs; [ hydraulic valve actuators and controls for machines, motors and engines; hydraulic linear actuators; hydraulic valve actuators; ] valves operated automatically by hydraulic control being parts of machines; [ clack valves being parts of machines; hydraulic valves being parts of machines; motorized valves parts of machines; pressure valves being parts of machines; ] valves being parts of machines; [ control valves being parts of machines; exhaust ...