"'Mike'" wrote in message
...
"Sacha" wrote in message
. uk...


I thought 'how charming' and then it was explained to me that these were
a
sort of sacrificial anode
Sacha

and a sacrificial anode is.....?





http://www.mgduff.com/

Mike
Marine Electrical Design Engineer
--
.................................................. .........
Royal Naval Electrical Branch Association
www.rnshipmates.co.uk
www.nsrafa.com