More than 3, 500 types of educational materials in various ethnic languages and more than 100 million copies are printed every year, he said.

每年印刷出版3500多种不同民族语言的教材,1亿多版本。 他说。

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Including frames, cladding materials, design printed layer, wind, rain and snow proof structure, and the night lights as the lighting facilities, making it the single copy costs more than other ads.

包括框架、覆面材料、图案印刷层、防风、防雨雪构造，以及夜晚作为照明的灯光设施，使得其在单件复制成本高于其他广告。

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