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Notes:1. This disinfectant is not suitable for use when the oxygen content in the air is less than 18% and the ambient temperature is -30℃~50℃.2. Cannot be used in tank, tank and other closed container environment.3. Do not exceed the maximum use concentration set in the filter cartridge.4. Do not use the product if it is cracked or damaged. Do not use the suction valve or the exhaust valve if it is deformed or damaged.5.Confirm the concentration and type of harmful gas in the workplace, and select the appropriate filter cartridge.6. In case of physical discomfort, increased resistance and peculiar smell, please leave the scene to check the respirator or confirm to replace the filter cartridge.Wearing Instructions:1. Relax the five headbands, put the headbands on the back of the head, and cover the face with the respirator forward.2. Tighten the five headbands, adjust the matching density between therespirator and the head, first adjust the neck band, then turn the front band, do not adjust the headband too tightly.Tightness test:Cover the connection of the filter cartridge with the palm of your hand and breathe in slowly. If breathing is difficult, wear the respirator with good tightness. If you feel you can breathe in air, you need to adjust the position of the respirator and the tightness of the headband to eliminate air leakage.