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fire rating (A fire rating refers to the length of time that a material can withstand complete combustion during a a standard fire rating test.  wisegeek.com Alexander Demidov) | |||
| fire-proof efficiency (elena.kazan) | |||
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| fire rating (A fire rating refers to the length of time that a material can withstand complete combustion during a a standard fire rating test. wisegeek.com Alexander Demidov) | |||
| fire-proof efficiency (elena.kazan) | |||