The surface morphology after preferential corrosion along the vertical orientation was observed via an optical microscope.
用光学显微镜观测和分析电火花线切割硅表面沿纵向分层择优腐蚀后的形貌；
2
The appearances and particle size distribution of slag micro-powder produced by ball mill and vertical mill were researched with scanning electron microscope and laser particle size analyzer.