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IELTS BNC: 15187 COCA: 13303
piston
pɪstən ˈpɪstən
Word forms: plural pistons
N-COUNT 活塞 A piston is a cylinder or metal disc that is part of an engine. Pistons slide up and down inside tubes and cause various parts of the engine to move. 活塞
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IELTS BNC: 15187 COCA: 13303
IELTS BNC: 15187 COCA: 13303
IELTS BNC: 15187 COCA: 13303
piston

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