多装配线车间
the workshop of batch assembly line
正线线间距
Midway between Tracks of Main Line
x射线绕射衬法
x-ray diffraction contrast method
X射线绕射分析
X-ray diffraction analysis
x射线绕射粉末照相机
X-ray diffraction powder camera
X射线绕射图谱
X-ray diffraction pattern
X射线绕射图式
X-ray diffraction pattern