1700

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  • 720.2446483180428 X 1280
  • 720.2446483180428 X 1280

fluvial_landforms_of_streams bedrock Rock 자갈 sunlight creek stream pebble Boulder watercourse 햇빛 algae

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246810abba

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11

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21

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11

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10

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0

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246810abba246810abba
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0

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0

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0

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246810abba246810abba
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0

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0

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246810abba246810abba