4. Education and demonstration
  5. Question or problem eliciting response

Hsien Tsung Chang

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Computer-aided learning method and systems matching students...

Education and demonstration – Question or problem eliciting response
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Eyeglass device

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With antiglare or shading
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2138284

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