chain gearingdrive chaindriving chaingearing chainmessenger chaintra mitted chaitransmission chaintransmitted chains传动: transmission; drive; driving ...链: chain传动链轮: drive sprocket wheel; driving sprocket传动链条: driing chain; drive chain; drive-chain; driving chain传动链条罩: drive chain guard下载手机词典可随时随地查词查翻译