Assertion: bellow | /r/HasProperty | formed
Facets:
value: from most ductile materials
type: OTHER
value: by welding preformed washers
type: OTHER
Source sentences:
text: A bellows can be formed by deep drawing a single piece of metal, or by welding preformed washers together.
text: Bellows can be formed from most ductile materials that can be welded by the automatic T.I.G. welding process and result in a homogenous weld structure.