Assertion: trawl's mouth | /r/HasProperty | open
Facets:
value: by a beam
type: CAUSE
value: in this type of trawl
type: TEMPORAL
Source sentences:
text: As the mouth of the net is kept open by the lateral pull of the individual vessels, otter boards are not required.
text: The mouth of the net is weighted and kept open by a metal beam that can be up to 12m long.
text: In this type of trawl the mouth of the net is kept open by a beam which is mounted at each end on guides or skids which travel along the seabed.