冶金专业英语词汇ubar槽钢uforming弯成u形uing弯成u形unotchu形缺口upressu形压弯机utubemanometeru形管压力计utubepressuregageu形管压力计uhpelectricarcfurnace超高功率电炉ullmannite锑硫镍矿ulrichite方铀矿ultimateanalysis元素分析ultimatedeformation极限形变ultimatestrength极限强度ultimatetensilestrength极限抗强度ultimatetensilestress极限拉伸应力ultrafinepowder超细粉ultrahighstrengthsteel超高强度钢ultralightalloy超轻合金ultramicroscope超显微镜ultrasoniccleaning超声波清洗ultrasonicdrawing超声拉拔ultrasonicechomethod超声波回声法ultrasonicflawdetector超声波探伤器ultrasonicinspection超音波探伤法ultrasonicreflectoscope超声波探伤器ultrasonicthicknessgage超声波测厚仪ultrasonicwave超声波ultrasonicwelding超声波焊接ultrasonics超声波学ultravioletrays紫外线umklapptransformation反相变unburnedpellets未焙烧球团矿unburnedrefractory未烧耐火材料uncoatedelectrode***焊条uncoiler开卷机uncoiling开卷uncombinedcarbon游离碳underannealing不完全退火underbeadcrack焊道下裂纹undercooling过冷undercut底部