对大多数产品,国家都有规定的质量标准.但是.由于国家标准通常是通过严格的物理化学技术参数来衡量的,所以一般老百姓无从鉴别产品的等级。国标对陶瓷卫生洁具从技术上对尺寸允许偏差、变形、物理性能(例如吸水率、抗裂)进行了严格的规定,所谓一级品、二级品、三级品需要有严格的数据与之对应。消费者在买此类产品时,无法鉴别选购。而与此同 For most products, the country has a set quality standard. However, because the national standard is usually measured through strict physical and chemical technical parameters, the average person does not have the grade to identify the product. The national standard strictly regulates the dimensional tolerance, deformation, and physical properties (such as water absorption and crack resistance) of ceramic sanitary wares. The so-called first-class, second-grade, and third-grade products need to have strict data. correspond. Consumers cannot identify purchases when buying such products. And with this