欧美一级视频精品观看-欧美一级三级-欧美一级日韩一级亚洲一级va-欧美一级日韩一级亚洲一级-中文字幕精品一区-中文字幕精品视频在线观看

GB 12358-2024The General Technical Requirements for Workplace Gas Detection and Alarm Instruments is an important national standard,
Intended to standardize the performance, functionality, and testing methods of environmental gas detection and alarm instruments used in workplaces.
This standard was published in 1990 and has undergone multiple revisions.
The new version is GB 12358-2024, which will be officially implemented on June 1, 2025.
The standard is applicable to the production and use of combustible gas, toxic and harmful gas, and oxygen detection and alarm instruments in the workplace.