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The sand industry has been using the UV mapping as the standard test method of sand fade.
现今彩砂行业已采用紫外线映照作为彩砂褪色性的规范测试办法。
youdao
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The sand industry has been using the UV mapping as the standard test method of sand fade.
现今彩砂行业已采用紫外线映照作为彩砂褪色性的规范测试办法。
youdao