And cheap the profile that window of model steel door uses, calcium carbonate content exceeds 50% , additive contains plumbic salt, stability is poor, and influence human body is healthy.
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- 而廉价塑钢门窗使用的型材,碳酸钙含量超过50%25,添加剂含有铅盐,稳定性差,且影响人体健康。