Home / Standards / LD 6-1991 LD 6-1991 Active 电动送风过滤式防尘呼吸器通用技术条件 Standard Type LD6- ICS N/A CCS N/A Status Active Issue Date 1991-08-05 Implementation 1992-07-01 Centralized Committee 劳动部 Issuing Authority 劳动部