Assertion: stroller's wheel | /r/AtLocation | the wheel
Facets:
value: via an 80:1 harmonic drive
type: CAUSE
Source sentences:
text: Each wheel had its own electric drive made by Delco, a direct current (DC) series-wound motor capable of 0.25 horsepower (190 W) at 10,000 rpm, attached to the wheel via an 80:1 harmonic drive, and a mechanical brake unit.