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Từ điển Oxford Advanced Learner 8th
piston
pis·ton [piston pistons] BrE [ˈpɪstən] NAmE [ˈpɪstən] noun a part of an engine that consists of a short ↑cylinder that fits inside a tube and moves up and down or backwards and forwards to make other parts of the engine move Word Origin: early 18th cent.: from French, from Italian pistone, variant of pestone ‘large pestle’, augmentative of pestello ‘pestle’.
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