137. During an inspection of a ships storeroom, you find sealed containers of chemicals labeled "potassium bicarbonate" and "potassium chloride". These chemicals are most commonly used aboard ship for _______.

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recharging dry chemical fire extinguishers

137. During an inspection of a ships storeroom, you find sealed containers of chemicals labeled «potassium bicarbonate» and «potassium chloride». These chemicals are most commonly used aboard ship for _______.

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137. During an inspection of a ships storeroom, you find sealed containers of chemicals labeled «potassium bicarbonate» and «potassium chloride». These chemicals are most commonly used aboard ship for _______.

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