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How does sunshade drop in temperature again small sunshade choose and buy has ke
From;    Author:Stand originally

     in addition, the reporter still learns, according to national level " the assess that textile defends ultraviolet performance " regulation, upf (ultraviolet ray defends coefficient is worth) be more than 30, and Uva (long wave ultraviolet ray) when transmitance is less than 5 % , ability is called defend ultraviolet product, defend grade level is " Upf30 + " ; Be more than when Upf 50 when, show product ultraviolet ray defends function is admirable, defend grade label is " Upf50 + " . Consumer is when the choose and buy, should examine carefully defend grade marks.

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