Horseshoe or U magnets which can often be used in water, should be stored with a piece of iron across their ends.
(Horseshoe or U magnets; can be used; L:in water; T:often) (Horseshoe or U magnets; should be stored; with a piece of iron across their ends)
Horseshoe or U magnets Horseshoe or U magnets
can be used should be stored
L:in water T:often
with a piece of iron across their ends