Assertion: persian wheel | /r/HasProperty | efficient
Facets:
value: mechanically
type: DEGREE
value: quite
type: DEGREE
Source sentences:
text: Although Persian wheels (…) are mechanically quite efficient, the main source of loss from these types of device is that some water is spilled from the buckets and also there is a certain amount of friction drag caused when the buckets scoop up water, which again reduces efficiency.