English teaching appliance

• Main Authors: HE ZENIAN, HU YABO
• Format: Patent
• Language: Chinese; English
• Published: 19.03.2019
• Subjects: ACCESSORIES THEREFOR; ADVERTISING; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE; CINEMATOGRAPHY; CRYPTOGRAPHY; DIAGRAMS; DISPLAY; EDUCATION; EDUCATIONAL OR DEMONSTRATION APPLIANCES; ELECTROGRAPHY; GLOBES; HOLOGRAPHY; PHOTOGRAPHY; PHYSICS; PLANETARIA; SEALS

The utility model relates to a building technical field, more specifically says and relates to an english teaching appliance, including projection case, the inside projection curtain that is equippedwith of projection case, projection case one side is equipped with the draw -in groove, projection ca...