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vacuum diaphragm /ˈvakjuːm ˈdaɪəfɹˌam/ n

中文：真空隔膜

中文 · 真空隔膜Español · diafragma de vacíoFrançais · capsule à membrane
Meaning：Device connected to the distributor cap specifying the precise moment ignition must be produced relative to the engine’s rotation speed.
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Gasoline engine Gasoline engine

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