Assertion: wheel | /r/HasAspect | a wheel and axle mechanism
Facets:
Source sentences:
text: True potter's wheels, which are freely-spinning and have a wheel and axle mechanism, were developed in Mesopotamia (Iraq) by 4200–4000 BC.
text: True potter's wheels, which are freely-spinning and have a wheel and axle mechanism, were developed in Mesopotamia (Iraq) by 4200–4000 BCE.