A white pigment consisting of a mixture of zinc sulfide, zinc oxide, and barium sulfate .
A white pigment consisting of a mixture of zinc sulfide, zinc oxide, and barium sulfate .
钡硫酸盐是一种辐射光不能穿透的状之。
A white pigment consisting of a mixture of zinc sulfide, zinc oxide, and barium sulfate .
钡硫酸盐是一种辐射光不能穿透的状之。