A dust Mask is A Flexible Pad Held Over The Nose And Mouth By Elastic Or Rubber Straps To Protect Against dusts encountered During construction or cleaning activities, ...
Hi. This Is Grace From Seyi. Magnesium Oxide Board Is Known As Magnessium Board, Mgo Board. The Main Raw Material Is Magnesium oxide(mgo), magnesium chloride(mgcl2), perlite,fiber glass mesh,etc. . ...