Assertion: boiler | /r/HasAspect | a pressure gauge
Facets:
value: with an internal siphon
type: OTHER
value: with 2 needles
type: OTHER
Source sentences:
text: Some boilers have a pressure gauge with 2 needles
text: Each steam boiler must have: A pressure gage with an internal siphon, a siphon in the gage piping, or equivalent protection (PG-60.6, HG-602).