BSI BS 638-9
BS BS 638-9 1990-JAN-01 Arc Weldng Power Sources Equpment and Accessores Part 9 Specfcaton Power Sources for Manual Arc Weldng wth Lmted Duty-AMD 8489 May 15 1995 Superseded by BS BS EN 60974-6
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Requirements for small power sources for use with covered stick electrodes. Intended for use, primarily, by the non-professional welder.