This standard specifies the two-level classification and coding of meteorological data, and is the basic standard for further clas

This standard specifies the principles, items, organization, procedures, content, methods, analysis and evaluation of lightning di

This standard specifies the main technical requirements, inspection methods and inspection rules, packaging, storage and other con

This standard specifies the items, requirements and methods for the design technology evaluation of lightning protection devices.

This standard specifies the items, requirements and methods for the quality supervision and acceptance of lightning protection dev

This standard specifies the test methods for surge protective devices (SPD) used in low-voltage power distribution systems and sur

This standard specifies the definition, index and calculation method, grade classification, grade naming and usage of waterlogging

This standard specifies the category and definition, basic regulations, gas stations and facilities, gas metal pipelines, electric