... blister , quartz bulb, quartz labware, quartz crucible, crucible, crystal powder, silicon powder, fused quartz,silica powder,high purity silica ... powder,quartz sand ,crystal powder,quartz sand,produce crystal powderTolerance Dimensional Tolerance Diameter Range Range of ... -degree partial wall Siding ellipticity Out of Round Bending Degree Bow/1220mm ≤ 6mm ± 2.0% ± 10% 12% 2.0 ...