指导性文件 meaning in Chinese

guidance note

Iec quality assessment system for electronic components - guidance documents
电子元器件iec质量评定体系.指导性文件
Pumping stations ; centrifugal pumps for operation with screen ; directives for planning
泵站.带滤网运行的离心泵.设计用指导性文件
Pumping stations ; centrifugal pumps for operation without screen ; directives for planning
泵站.不带滤网运行的离心泵.设计用指导性文件

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