Demonstration device for English teaching
The utility model provides a demonstration device for English teaching, which comprises a main panel, a mounting groove is arranged on the outer wall of one side of the main panel, a dust collector is fixed on the inner wall of the bottom of the mounting groove, a rectangular groove is arranged on t...
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Format: | Patent |
Sprache: | chi ; eng |
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Online-Zugang: | Volltext bestellen |
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