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过压保护 overvoltage protection
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过流保护 overcurrent protection
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助燃保护 Combustion protection
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防雪保护 snow protection
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短路保护 short circuit protection
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欠压保护 undervoltage protection
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漏电保护 leakage protection
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过温保护 overtemperature protection
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防水保护 waterproof protection