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Study on the dynamic accumulation rule that cadmium and copper accumulate in Pakchoi different portions by simulating pollution.

通过模拟污染，研究了镉和铜在小白菜中各部位的动态吸收规律。

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By means of weight loss method, effect of descaling agents GN-1 and GN-2 on corrosion of red copper and carbon steel was studied under dynamic and static conditions.

采用静态、动态失重法研究了GN 1和GN 2除垢液对紫铜、碳钢试片的腐蚀，试验了有无缓蚀剂存在等条件下的腐蚀情况。

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