 |
| English | Chinese |
| A first class | 头等 |
| age-class | 龄级 |
| alum-saturated class D gypsum plaster | 德国大理石水泥经矶土处理石膏 |
| first class | 最佳级 |
| hardness class | 硬度等级 |
| noise isolation class | 隔声等级 |
| white collar class | 白领阶层 |
|
| English | Chinese |
| A first class | 头等 |
| age-class | 龄级 |
| alum-saturated class D gypsum plaster | 德国大理石水泥经矶土处理石膏 |
| first class | 最佳级 |
| hardness class | 硬度等级 |
| noise isolation class | 隔声等级 |
| white collar class | 白领阶层 |