UL 297-1998 UL Standard for Safety Acetylene Generators@ Portable@ Medium-Pressure (Seventh Edition; Reprint with Revisions Through and Including January 26@ 2000)
2003UL 297 BULLETIN-2003 UL Standard for Safety Acetylene Generators@ Portable@ Medium-Pressure
1998UL 297-1998 UL Standard for Safety Acetylene Generators@ Portable@ Medium-Pressure (Seventh Edition; Reprint with Revisions Through and Including January 26@ 2000)