直接观察法
direct observation
direct observational method
扫描电镜观察法
scanning electron microcope
原子尺度直接观察与模拟
direct observation at atomic scale and simulation
锥光偏振显微镜观察法
conoscopic microscopic observation
六组分分离法
the separation method on coal six chemical components
the separation way of six group compositions
暗场观察法
dark ground method of observation
变步长扰动观察法
perturbation and observation method with changing perturbation step
参与观察法
participant observation method