Assertion: planetarium's door | /r/HasProperty | opened
Facets:
Source sentences:
text: However, the dome must be air locked so when the door to the dome is opened, there is minimal air exchange between any conditioned building space (including the control room) and the observatory dome space.
text: The control room must be air locked so when the door to the dome is opened, there is minimal air exchange between the control room and the dome.
text: (Bear in mind that when these doors are opened they will need about 4 feet of clearance on the east and west sides of the structure.)