Assertion: bunsen burner's air hole | /r/HasProperty | covered
Facets:
value: partially
type: DEGREE
value: by turning the collar
type: MANNER
Source sentences:
text: The air hole can be partially or completely covered by turning the collar.
text: The collar is an adjustable metal ring that allows the air hole to be partially or completely covered.
text: Because the air hole is covered, less oxygen can burn with the gas, meaning the flame will not burn as efficiently.
text: Turn the collar so that the air hole is covered.