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The chain drive consists of a duplex roller chain which drives both intake and exhaust camshafts. 鏈條驅(qū)動(dòng)機(jī)構(gòu)包括一條雙排輥鏈，通過它來驅(qū)動(dòng)進(jìn)氣和排氣凸輪軸。