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制冷俱乐部 http://www.china-r.com/club/
连杆 connecting rod连杆大头 crank pin end连杆小头 piston pin end曲轴 crankshaft主轴颈 main journal曲柄 crank arm,crank shaft曲柄销 crank pin曲拐 crank throw曲拐机构 crank-toggle