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The melt blown cloth burns smokeless without coke, and some other fake masks with napkins burn with smoke and coke. Therefore, the authenticity of masks can be distingu…
Ö 2021/7/29 Ø 1423 人瀏覽過(guò) |
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Melt blown nonwovens (also known as melt blown nonwovens and melt blown fabrics) have the characteristics of fine fiber, large specific surface area, small porosity and…
Ö 2021/7/29 Ø 1703 人瀏覽過(guò) |
