| 单词 | powder photography |
| 释义 | powder photography (extremely rare) n WORD FAMILY powder photography n 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 Syn|Hyper powder method, powder technique photography the process of producing images of objects on photosensitive surfaces |
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