First contender: a beach umbrella, which they evaluated with a spectrophotometer to see if UV rays passed through.
第一个竞争者：一把遮阳伞，他们用分光光度计来评估紫外线是否通过。
Protective to the UV ray such as beach clothes umbrella.
沙滩服、野外帐篷、沙滩伞及其对紫外线敏感领域。
The method for making umbrella cover materials is to mix the UV absorber and coating base materials and then to conduct coating and baking.
其制做伞面材料方法是将紫外线吸收剂与涂料基料均匀混合后涂布、烘干即可。
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