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brake booster /ˈbɹeɪk ˈbuːstə/ n

中文：制动助力器

中文 · 制动助力器Español · servofrenoFrançais · servofrein
Meaning：Mechanism amplifying the force exerted by the driver on the brake pedal.
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Found in these illustrated scenes（2）

Car systems Anti-lock braking system

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