中文版
1.It is used to prevent various dusts and fogs produced due to mechanical force during treatment of coal, iron ore or quartz mineral or the processing of vehicles, ship building, smelting, welding and grinding, when it is ten times of the occupational exposure limit or below the local concentrate limit.
2.It cannot be used during paint spraying and sand blasting, not applicable for prevention from harmful gas and steam. This mask is not able to produce oxygen, which shall not be used when the oxygen content is less than 19.5% and where the oil mist exists.
