Kopp–Etchells effect (Q96386275)
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sparkling ring created when the helicopter rotor abrasion shields grind down sand
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Kopp–Etchells effect |
sparkling ring created when the helicopter rotor abrasion shields grind down sand |
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Wikipedia(3 entries)
- enwiki Kopp–Etchells effect
- fawiki اثر هاله شن
- frwiki Effet Kopp-Etchells