electroslagn.电炉渣electropref.电的；电子的；电解的=electr-.electrophoresis mass spectrometry质谱技术electromechanical analog computer机电模拟计算机Electro-Optical Guidance System光电制导系统electrostatic electron microscope静电型电子显微镜electrooptic frequency modulation电光调频electromagnetic directional valve电磁换向阀electromagnetic levitation system电磁悬浮系统electro discharge sinking machine电火花成形机electro - chemical luminescence电化学发光electrogravimetric trace analysis电重量痕量分析法