20 um High Whiteness Fused Silica Powder Melted Quartz Sand for Investment Casting
20 um High Whiteness Fused Silica Powder Melted Quartz Sand for Investment Casting.
Model:OBT-20um
20 um High Whiteness Fused Silica Powder Melted Quartz Sand for Investment Casting.
Model:OBT-20um
Precision casting use high purity fused silica sand 20-50 mesh SiO2 99.7%
Model:OBT-20-50