To help children learn efficiently, the appropriate angle can be adjusted according to the children's different learning needs, so that children can learn more easily, creating a non-interference and focused learning environment for children in all aspect
Thenon woven 5 ply protective kn95 face mask filtration efficiency of kn95 grade Bai cover for particles with aerodynamic diameter ≥0.3 m reached 95% or above.The aerodynamic diameter of airborne bacteria and fungal spores varied mainly between DAO0.7-10
PVC coated protective gloves are evenly translucent, soft to the touch, comfortable to wear, no odor, no toxic side effects on the human body, and environmentally friendly. PVC coated protective gloves are resistant to abrasion and cutting.