Assertion: cryolite's amount | /r/HasProperty | supplied at the top of the outlet pipe
Facets:
Source sentences:
text: It can automatically be opened and closed at equal intervals, thereby each time permitting the lower ,portion of the alumina filter material in the outlet pipe which portion is enriched with adsorbed sodium bitluoride, to drop down into the furnace and the electrolytic bath while the same amount of fresh alumina is supplied at the top of the outlet pipe.