SPECTACLE BLIND
type: ClassOfInanimatePhysicalObject
has creation date: 2006.06.15
has creator: u83130
has definition: An 'artefact' that consists of two discs with equal thickness and outer diameter connected with a flat bar. One of the discs has a hole, while the other disc is without hole.
has designation: SPECTACLE BLIND
has id PCA: RDS422324
has note: The first is installed as a restriction orifice between pipe flanges during normal operation, and the latter when blocking is required.
has status: Qualified