20~40
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Surface composition was determined by X-ray photoelectron spectroscopy (XPS). The grafted PC groups can cover 20%~40% of the surface.
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This year, we will build on that basis and continue to substantially raise the minimum purchase prices of grains.
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Commissions vary from 20% - 40% based on sales milestones reached and whether the photographer grants iStockphoto exclusive use of images.
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