The causes of the wearable zone dropout were analyzed by the metallography analysis and SEM.采用金相分析和扫描电镜分析方法,分析了钻杆接头喷焊耐磨带脱落原因.The strain of the proeutectoid ferrite in hypoeutectoid steel drawing measured and analyzed by ...
The cello is a member of the violin family.大提琴是提琴家族的一员.She plays the cello in an orchestra.她在管弦乐队中演奏大提琴.His cello technique is unique.他的大提琴(演奏)技巧是独一无二的....