目的：观察黄芪精口服液防治小儿反复呼吸道感染（IRRI）的疗效和对免疫功能的影响。
Object: To observe the effect of oral fluid of astragalus essence in preventing and curing infant repeated respiratory infection (IRRI)and the influence of that on immune function.
经过反复的工艺试验及一年多批量生产验证，成功地将熔融石英应用于精铸用低温蜡—硅溶胶型壳生产中。
By repeating technological tests and batch production tests for over a year, the fused silica was successfully used in the production of silica sol shell for low temperature wax precision casting.
肾精不固，抗病能力低，易反复发作此类疾病。
Shenjing not solid, low-resistance capability, easy to repeatedly attack the disease.
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