Assertion: bunsen burner's part | /r/HasProperty | needle valve
Facets:
Source sentences:
text: The three principal parts of the burner are: barrel, needle valve, and base.
text: The three principal parts of the burner are: barrel, needle valve, and base.
text: The three principal parts of the burner are: barrel, needle valve, and base.
text: The three principal parts of the burner are: barrel, needle valve, and base.