Main structure of products The ordinary medical mask is made of spunbonded polypropylene filament non-woven fabric and solution spray filter cloth, and the lace up is made of spunbonded polypropylene filament non-woven fabric or spandex elastic belt.

Name: Carbon Additive (Calcined Anthracite) Introduction: We
Name: Rare Earth Silicide Introduction: It is mainly used in metallurgy