threeling三连晶threenum.三n.三；三个adj.三个的three-pointodontograph三点画齿规three bearing crankshaft三桥承曲轴three dimensional stress三维应力three - wire principle三线制three sheets in the windadv.大醉three- level inverters三电平逆变器Three-Mountain Nunnery三山庵three-roll roller mill三辊滚轧机three-folded resonator三折谐振腔three-dimension cavern三维洞室