Amazon.com: surgical mask- หน้ากากผ่าตัด en14683 type iir layer ,KN95 Face Mask 20Pcs, Included on FDA EUA List, 5 Layer Design Cup Dust Safety Masks, Breathable Protection Masks Against PM2.5 Dust Bulk for Adult, Men, Women, Indoor, Outdoor Use, Black. 4.6 out of 5 stars 1,561. $38.99 $ 38. 99 ($1.95/count) Get it as soon as Mon, Jan 18.DRK-1000 Bacterial Filtration Efficiency Detector7.The inner layer of the cabinet is made of stainless steel, the outer layer is sprayed with plastic and cold-rolled, and the inner and outer layers are insulated and flame retardant. 8.The front switch type glass door is convenient for the experimenter to observe and operate.



DRK-1000 Bacterial Filtration Efficiency Detector

7.The inner layer of the cabinet is made of stainless steel, the outer layer is sprayed with plastic and cold-rolled, and the inner and outer layers are insulated and flame retardant. 8.The front switch type glass door is convenient for the experimenter to observe and operate.

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4 ply active carbon face mask certificated earloop in ...

Disposable 4 Ply Activated Carbon Face Masks Material: 1st layer: 20gsm PP non woven 2nd layer: 40gsm active carbon fabric 3rd layer: 20gsm filter paper, BFE>95 &99% 4th layer: 25gsm PP non woven( ES material available) Size: Adult: 17.5*9.5CM Child: 14.5*9.5CM Packing: A. Regular Packing : 50pcs/box, 2000pcs/ctn, B. Individual Packing: 1pc/bag ...

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4 ply active carbon face mask certificated earloop in ...

Disposable 4 Ply Activated Carbon Face Masks Material: 1st layer: 20gsm PP non woven 2nd layer: 40gsm active carbon fabric 3rd layer: 20gsm filter paper, BFE>95 &99% 4th layer: 25gsm PP non woven( ES material available) Size: Adult: 17.5*9.5CM Child: 14.5*9.5CM Packing: A. Regular Packing : 50pcs/box, 2000pcs/ctn, B. Individual Packing: 1pc/bag ...

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Amazon.com: surgical mask

KN95 Face Mask 20Pcs, Included on FDA EUA List, 5 Layer Design Cup Dust Safety Masks, Breathable Protection Masks Against PM2.5 Dust Bulk for Adult, Men, Women, Indoor, Outdoor Use, Black. 4.6 out of 5 stars 1,561. $38.99 $ 38. 99 ($1.95/count) Get it as soon as Mon, Jan 18.

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