Assertion: atomic clock | /r/ObjectUse | used in the dcf77 facility
Facets:
value: in mainflingen
type: LOCATION
Source sentences:
text: The four German primary caesium (fountain) atomic clocks (CS1, CS2, CSF1 and CSF2) in use by the PTB in Braunschweig ensure significantly less long term clock drift than the atomic clocks used in the DCF77 facility in Mainflingen.