
Protective filters for welding and other industrial operations..
NORM herausgegeben am 12.9.1947
    
        Designation standards: BS 679:1947
                
                
                
                Note:    UNGÜLTIG
               
                Publication date standards:  12.9.1947
        Approximate weight : 300 g (0.66 lbs)
        Country:          British technical standard
        Kategorie: Technische Normen BS