"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.....?
M.G.Duff will explain if Hubbard cannot.
Mike
--
.................................................. .........
Royal Naval Electrical Branch Association
www.rnshipmates.co.uk
www.nsrafa.com