现代显微镜与电子显微镜 第一台电子显微镜by Ruska in1930s ..3/ 信m 场lte fiayMarch 9,1931 1938 Sketch of 1st TEM 1st commercial TEM by Siemens 7现代显微镜与电子显微镜 第一台电子显微镜by Ruska in 1930s March 9, 1931 1938 7 Sketch of 1st TEM 1 st commercial TEM by Siemens