Zhengzhou Zhengtong Abrasive Import&Export Co., Ltd is exporter of blasting media ceramic beads, brown fused alumina, black fused alumina, white fused alumina & grinding media zirconia beads,
Black aluminum oxide 0-1, 1-3, 3-5, 5-8mm for wear-resistant pavement Black aluminum oxide is a gray-black crystal with Al2O3 and iron spinel as the ...