Data Search of Major Classification
| Major Class | Parent | Descriptor | Acronym | Synonym | Chinese Descriptor | Spanish Descriptor | Reference | Definition |
| Product | Opacity Monitors | 不透光度分析仪 | Opacidad Monitores |
| Major Class | Parent | Descriptor | Acronym | Synonym | Chinese Descriptor | Spanish Descriptor | Reference | Definition |
| None defined at this time . . . | ||||||||