工龄
5.According to the law, the purchasers enjoy the rights of housing reform and late spouse seniority discount.
6.How are the length of service after worker come off sentry duty and endowment insurance calculated?
8.Biological indexes PbB ,ZPP,EFP, Hb and PbU were different between < 10 years and >0 years groups.
9.Methods: Multi-logistic regression was used to establish a regression model formed by three factors and pneumoconiosis prevalence probabilities. The three factors are exposure time (ET) of workers to the dust, the average exposure concentration (AEC) by exposure ages, and dust toxicity (T).
10.Males reaching the age of 60 and females 50 with a seniority of ten years of continuous service.


