PbF failure of 20mm fuse ?
Set fuse in an open frame fuse holder. Ground into the glass until it
cracked. Could insert a needle in there and o/c in both directions.
One end broken , whether by me , unknown, other end fixed in. Crush the
glass in preset mole-grips and then I decided to prize out the caps from
the holder with a blade and the one with the still captive filament went
flying across the room
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