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.

• 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。