Some electro-hydraulic actuators require an external hydraulic tank, pumps etc. A self-contained electro-hydraulic actuator includes integral hydraulic components with the electrically driven pump. The controls are external.
Moog have one somewhere too although they weren't doing a great job of advertising it when I was looking. If you're UK-based then pray the sales guy who we spoke to a few years ago has left. A shame because Moog's servo-hydraulic products are first class.
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If we learn from our mistakes I'm getting a great education!