Assertion: blast furnace's operation | /r/CapableOf | remain unchanged
Facets:
value: for centuries
type: TEMPORAL
value: virtually
type: MANNER
Source sentences:
text: While many aspects of ironworking have benefited from modern technology, the basic design and operation of the blast furnace has remained virtually unchanged for centuries, owing to the fact that it is still the most economic way to produce iron on large scale.