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Mattoon . IL . 61938-9375 .  1.888. GO FESSI (1.888.463.3774) |
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| How Does It Work? |
 | How Do Photoelectric Smoke Detectors Work? | | How do multi-class dry chemical fire extinguishers work? | | Fire Extinguisher Sizes | | Different Types of Fire Extinguishers | | What is Fire? |
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