Assertion: steel wool | /r/HasProperty | 0.03 to 0.1 mm
Facets:
value: in diameter
type: OTHER
Source sentences:
text: In the friction material of this invention, steel wool with filaments being 0.03 to 0.1 mm in diameter and 3 to 20 mm in length is used after it is pretreated by liquid thermosetting resins.