Servos for large radars and launchers are either electro-hydraulic or all-electric.

大型雷达和发射装置的伺服系统，不是电动-液压式的，就是全电动式的。

youdao

Oddly, it did once exist in that form: in the first trailer, shown months ago, which featured no talking at all, and no shouting, either just a silent montage of mayhem, overlaid with the twang of a plaintive electro-soundtrack.

NEWYORKER: Out There