upper nut上螺母
upperadj.较高的;上面的;上部的n.鞋帮;上铺n.兴奋剂;令人兴奋的经历
upper elevator screw bushing升降机螺旋上端套
upper variation of tolerance上偏差
upper reaches of Weihe River渭河上游
upper semi-continuous maps上半连续映射
upper surface of the airfoil机翼上表面
Upper half mean fibre length纤维上半部平均长度
upper compacted cloth packer上压式布匹打包机