Assertion: air pump | /r/HasProperty | device
Facets:
Source sentences:
text: An air pump is a device used to move air, possibly under pressure.
text: A vacuum pump is a device that removes gas molecules from a sealed volume in order to leave behind a partial vacuum.
text: An air pump is a device attached to the outside of an aquarium that moves air through your tank water in some manner.
text: He invented the vacuum pump, a device that can draw out air or gas from the attached vessel.