This soft yet brittle substance was first wrapped in string to make pencils.
2.
In places not encrusted, the hull metal has been transformed into a brittle substance, like crumbling carbon, which is then easily reduced to powder.
3.
Leo Baekeland, Belgian by birth and a naturalized American citizen, discovered that these tars could be cured into a brittle substance which he marketed as Bakelite .
4.
They are constructed of a very brittle substance that transfers most of the energy to the primary target but then fragment into much smaller pieces or dust so as not to injure unseen targets such as hostages or non-combatants that may be standing behind a breached door.
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