Iron oxide and cobalt-modified iron oxide particles are the most stable of the commonly available magnetic materials used in videotapes.
(Iron oxide and cobalt-modified iron oxide particles; are; the most stable of the commonly available magnetic materials) (the commonly available magnetic materials; used; L:in videotapes)
Iron oxide and cobalt-modified iron oxide particles the commonly available magnetic materials
are used
the most stable of the commonly available magnetic materials
L:in videotapes