Erosive esophagitis and hiatal hernia were identified in 18 and 70 patients, respectively.腐蚀性食管炎以及食管裂孔疝分别为18和70例.The occurrence of peptic ulcer in some pa - tients with hiatal hernia may necessitate considerationof both ...
A new method for fabricating micro - optical elements with aspherical outlines is discussed.讨论了一种制作非球面微光学元件的新方法.The natural properties and characteristics of shellac resin and its application in fabricating optical are d...