ISA 12.26.01-1998 "Electrical Apparatus for Use in Class I@ Zone 1 Hazardous (Classified) Locations Type of Protection - Oil Immersion ""o"" (Second Printing: 9/1999)"
1998ISA 12.26.01-1998 "Electrical Apparatus for Use in Class I@ Zone 1 Hazardous (Classified) Locations Type of Protection - Oil Immersion ""o"" (Second Printing: 9/1999)"