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人造合成

人造合成

人造合成

人造合成

1

Even radioactivity can expose the source as synthetic or natural . Synthetic vanillin is prepared from coal tar, which has no radioactivity .

通过放射能可以揭露产品的来源是天然的还是人造合成的。

3

Aquamarine gemstones with similar natural, man-made synthetic sapphire sea of difference .

海蓝宝石与相似天然宝石、人造合成海蓝宝石的区别。

4

Man-made synthetic leather upper with unique wrap design on vamp .

人造合成革，鞋面上的独特包装设计上。

5

Man-made synthetic products such as tartrazine .

人造合成产品例如酒石磺。

6

The Present Situation and Development of Synthetic Leather Substrates

人造合成革基布的生产现状及发展

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