Methods Combing the reality in our country, to analyses the existing problems about the recall of drug and make out the pertinence strategies.
方法结合我国实际情况，分析药品召回存在的问题，有针对性地制定对策。
This paper analyses the principle and functions of protective earthing and hanging earthing conductor , and analyses the existing problems in practice.
分析了保护接地和挂接地线的工作原理、作用以及使用过程中存在的问题，值得工矿企业安全用电借鉴。
With an example of a section of air duct with a tee, analyses the existing problems when adjusting pipe diameter according to the pressure balance formula and the causes.
以一段带三通的并联风管为例，分析了根据该压力平衡公式调整管径时存在的问题及其原因。
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