Assertion: honeycomb's porosity | /r/HasProperty | about 20%
Facets:
Source sentences:
text: If the porosity of the honeycomb unit is about 20% or more, the pressure loss of the filter will not become larger, and, if the porosity is about 80% or less, the honeycomb structure will not have the strength thereof decreased and thus will not easily be broken.
text: When the porosity of the honeycomb unit is about 20% or more, the pressure loss of the filter becomes not higher.
text: When the porosity of the honeycomb unit is about 20% or more, the pressure loss of the filter becomes not higher.