centrebitn.中心钻centren.中心；集中点v.居中；使集中=center<美>adj.中心的；中央的centreless grinding machine external无心外圆磨床centreless ultra-precision grinder无心超精磨加工centreless grinding machine internal无心内圆磨床centre national du commerce extercue[经] 对外贸易中心Centre d'Etudes Pratiques d'AviationCentre National du Commerce Exterieurn.法国对外贸易中心centre transmit mud-pumping machine吸泥机centreless grinding machine principle无心磨削原理Centre for Continuing Legal Education法学继续教育中心centre-of-gravity mounting system重心支承系统