国产成人欧美一区二区三区一色天_久久成人一区二区_a在线视频_在线一区二区三区_在线视频亚洲_欧美日韩一区二区三区不卡视频

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.