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chem102-010-20170508-122000.mp4

UD Capture Recording

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chem102-010-20170501-122001.mp4

UD Capture Recording

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chem102-010-20170417-122000.mp4

UD Capture Recording

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chem102-010-20170324-122000.mp4

UD Capture Recording

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chem102-010-20170320-122000.mp4

UD Capture Recording

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chem102-010-20170208-122001.mp4

UD Capture Recording

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