servo unit; power booster; force multiplier
Technical term for a device that amplifies force or power, often used in mechanical or control systems.
This robot arm incorporates a high-precision servo unit.
By using a power booster, you can lift heavy objects with little force.
Compound of 倍力 (double force) and 装置 (device). The exact historical derivation is uncertain; the term is a modern technical coinage.