Assertion: littmann stethoscope | /r/HasProperty | dual frequency membranes
Facets:
value: for years
type: TEMPORAL
value: on each side of the chestpiece
type: LOCATION
Source sentences:
text: Note that all the Littmann stethoscopes include dual frequency membranes except for the Infant and Pediatric models.
text: However, Littmann stethoscopes have, for years, included a dual frequency membrane on each side of the chestpiece.