This method is simple and economical, and the accuracy of table no damage to life.
此法简单经济，对表的精度和寿命均无任何损害。
Methods: Seek interrelation between dust dose and morbidity level with the method of life table.
方法：应用寿命表法求得接尘剂量与发病水平的关系。
The survival rate was analyzed by life table method.
按寿命表法计算生存率。
The calculation of survival rate is by life-table method.
生存率计算采用寿命表法。
The calculation of survival rate is by life-table method.
生存率计算采用寿命表法。
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