参考词典中powder photography的常规释义：
基本释义
英英解释
- a process for identifying minerals or crystals; a small rod is coated with a powdered form of the substance and subjected to suitably modified X-rays; the pattern of diffracted rings is used for identification
[同]
powder method, powder photography, powder technique
点击查看……
鲁公网安备 37060202000128号 
