Assertion: vessel | /r/HasProperty | opened
Facets:
value: frequently
type: TEMPORAL
value: always
type: DEGREE
Source sentences:
text: Thus, if there is pressure in the vessel while it is being opened, initial turns of the bolts permit the head to lift slightly and the contained fluid escapes, alerting the operator to possible danger.
text: ( … these [vessels] are tubular and somewhat round, yet often become narrow, and they are always open, and none, as [far as] I could perceive, exude a liquid: they are composed of silvery sheets L, twisted into a helix, although they can easily be unbound, by tearing, into this somewhat long and connected strip (just as I have done in silkworm treacheas).
text: Gasketed joints can be used then vessels need to be frequently opened, and for instrument connections.