Observation product has without be short of the apparent quality blemish such as bubble of glair, stain, crackle, glair, ripple, those who have above drawback is absolutely cannot choose.

• 观察产品有无缺釉、斑点、裂纹、釉泡、波纹等明显质量缺陷，有以上缺陷的绝对不能选用。