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chem102-010-20170313-122000.mp4

UD Capture Recording

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chem102-010-20170306-122000.mp4

UD Capture Recording

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chem102-010-20170224-122001.mp4

UD Capture Recording

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chem102-010-20170222-122001.mp4

UD Capture Recording

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chem102-010-20170215-122001.mp4

UD Capture Recording

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