Assertion: piano's key | /r/HasProperty | spaced on 2.34288 cm intervals
Facets:
Source sentences:
text: Or, if we go with a fundamental unit of 0.9762 millimetres, then the white keys can be spaced on 2.34288 cm intervals, the internal mechanisms of the instrument can be spaced on 1.36668 cm centers, and the width of an octave is 16.40016 centimeters.