threenum.三n.三;三个adj.三个的
three drum boiler low-head低头三锅筒锅炉
three phase electric railway三相电气铁道
three yang meridians of hand手三阳经
three dimensional parametric维参数化
Three planes ultrasonography三平面正交超声
three-component fancy yarn三组分花式线
three phase four wire system三相四线制