ISO 21904-3:2018
焊接和相关工艺中的健康和安全 - 空气过滤设备的要求 测试和标记 - 第3部分:确定焊枪焊接烟雾抽取装置的捕获效率
Health and safety in welding and allied processes — Requirements, testing and marking of equipment for air filtration — Part 3: Determination of the capture efficiency of on-torch welding fume extract