But because raw material price is high, so in recent years plastic tray built-in pipe situation gradually increased.
但是由于原材料价格高，使得近年来塑料托盘内置钢管的情况逐渐增多。
A novel solar illumination system consisting of strip plane mirror array collecting sunlight, light pipe, coupling mirror and grinded plastic tray scattering light was introduced.
提出一种采光面积大、结构简单、制作容易、维修方便的平面反光镜阵列汇聚采光，导光管传光，平面镜耦合，磨砂塑料盘散光的新型太阳光照明系统。
It is widely used to make ventilation ducts for trains, anti-flammation cable tray, vessels, pipe and inner liners used under high temperature with anti-corrosion request.
产品广泛用于空调列车、高层建筑风道、阻然桥梁、耐高温耐腐蚀玻璃钢容器、管道内衬及阻然防腐海上钻井平台用玻璃钢格栅。
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