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China GB Standards List

 GB/T 40381-2021  
Specification of sapphire plate for laser window

激光窗口用蓝宝石晶体板状材料规范
 GB/T 3681.2-2021  
Plastics—Methods of exposure to solar radiation—Part 2: Direct weathering and exposure behind window glass

塑料 太阳辐射暴露试验方法 第2部分:直接自然气候老化和暴露在窗玻璃后气候老化

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