In addition, non-coated paper in high-humidity environment of sulfide, chemical pulp and fill applicatron dottle out acid melted, making of gold and silver monlchamus nigrescent who lose their luster.
此外,否涂料纸在矮境况下,学纸浆硫物及增添料洋磕酸矾土感,使纸背上金、银不朱发黑而获得光华。
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