Assertion: bellow | /r/HasAspect | shallow corners
Facets:
value: preferably
type: DEGREE
Source sentences:
text: Preferably, bellows should have shallow corners (high number of sides), are made out of thin (less compression tension) airtight, stretch free (stable) non-porous leather, using low volume hard glue, hard linen (non-stretch) inner hinges, panel tip support (usually silk), and are tension free constructed.