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Filtration mask, packaged filtration mask, and tearable container
Filtration mask, packaged filtration mask, and tearable container
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机译:过滤面罩,包装好的过滤面罩和可撕破的容器
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摘要
A packaged filtration mask comprising a filtration mask packaged in a container in a vacuum or a partial vacuum, wherein the packaged filtration mask comprises an indicator configured to indicate the presence of a vacuum or a partial vacuum in the container, or configured to indicate the lack of a vacuum or a partial vacuum in the container.
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