为降低劳动强度,提高安全系数,快速、准确地实现弹簧负荷分选,在TFK— 500型弹簧负荷分选仪上进行了改进设计,增加了自动送料机构.......

研究了中碳贝氏体支承辊钢在低应力、水润滑和牵引滚动条件下的接触疲劳裂纹萌生与扩展特征,发现了表面起源的垂直短裂纹和棘齿短......

Left ventricular diastolic function in 49 subjccts were studiedcineangiographically and compared with relevant indexes o......