Assertion: boiler's tube | /r/HasProperty | curved
Facets:
value: sufficiently
type: DEGREE
value: gradually
type: DEGREE
Source sentences:
text: The White-Forster type is similar to the Yarrow, but with tubes that are gradually curved.
text: Each tube was sufficiently curved to allow it to be extracted through the steam drum, but sufficiently straight that a single tube could be replaced from a tube bank, without requiring other tubes to be removed so as to permit access.