Methods: After literature search and analysis, the authors introduced the decision body, classification and contents of international Grading Nursing system.
方法：通过文献检索和实证研究，从分级护理的决策主体、分类、内容等方面对国外分级护理进行介绍。
The aim and significance of daily maintenance in operation of SDH optical transmission equipment for the electric power communication systems, the classification and contents of.
介绍了电力通信系统SDH光传输设备日常运行维护工作的目的及意义、维护工作的分类及内容、日常维护中应注意的一些问题。
Based on analyzing the lettering annotation, the paper generalized its characteristics including subordination on position, dispersion on arrangement, hierarchy and classification on contents.
分析了地图注记的特点，认为地图注记在地位上具有从属性，排列上具有分散性，在内容上具有分类性与层次性。
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