案例之一 周某,男,是一家塑料制品厂的老职工,曾在聚氯乙稀捏合工岗位上工作过,已年满55周岁,要求按提前退休有关规定办理提前退休。企业向劳动保障行政部门提交了有关审批表及周某的档案等材料。劳动保障行政部门通过查阅该职工的档案材料,发现周某是从事过生产聚氯乙烯制品捏合工,因 One of the cases, Zhou, male, is an old worker of a plastic products factory and once worked in a PVC kneading job. He has reached the age of 55 and demanded early retirement according to the relevant regulations on early retirement. The enterprise submitted to the labor and social security department about the approval form and archives and other materials Zhou. Labor and social security department by checking the staff archives and found that Zhou is engaged in the production of polyvinyl chloride kneading products, because