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Upper-anterior mediastinal前纵隔upper solution lower solution上下解upper reaches ofLancang river澜沧江上游