TOUGHENED

Before
1: S
been, have
2: SU
rubber
After
1: S
glass, up, its
2: SU
plastics
3: USU
ceramics
4: USUU
alumina
Surrounder Phrases
zirconia ceramicsepoxy composites, polymers, glass, materialsalumina ceramics, compositesplastics composites, materials, haveglass ceramics, epoxy, compositesrubber composites, materials, skinhave been, become, alsosafety glasscomposites materials, haveepoxies havepolymers havealso been, becomeceramics havehands upits transformationsteel materials