| 释义 |
powder photography- 英?[?paud? f??t?gr?fi:]
- 美?[?pa?d? f??tɑɡr?fi]
英英释义Noun1. 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
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