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piston
英/pˈɪstən/
美/ˈpɪstən/
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01n.
活塞, 活塞阀键
United States neoclassical composer (1894-1976); mechanical device that has a plunging or thrusting motion
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United States neoclassical composer (1894-1976); mechanical device that has a plunging or thrusting motion