生产的管材结构为内塑层薄外塑层厚，以利于与热熔管件连接；
The structure of pipe is thin inner plastic layer and thick outer plastic layer, easy to join with hot-melt pipe fitting.
教学部的工作理念是“内创和谐、外塑形象、教学相长、效果优良”。
The concept of the department is to create harmony inside, establish image outside, make progress in teaching and learning, and get superior effect.
外框可选择：铝材边框、钢板喷塑边框。颜色为黑金沙、磨砂银、亚光银、香槟色等颜色。安装方式：壁挂式、立式、台式、吊顶式。
The frame can choose: aluminum frame, steel spray frame. The color is black sands, silver, Ya Guang silver, champagne, etc... Installation: wall mounted, vertical, desktop, ceiling type.
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