( ( ( An ( open-end manometer ) ) ( ( containing water ) ( as ( the ( working fluid ) ) ) ) ) ( ( is ( used ( to ( ( measure ( ( the pressure ) ( of gas ) ) ) ( in ( a bulb ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT An) (JJ open-end) (NN manometer)) (VP (VBG containing) (NP (NN water)) (PP (IN as) (NP (DT the) (VBG working) (NN fluid))))) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB measure) (NP (NP (DT the) (NN pressure)) (PP (IN of) (NP (NN gas)))) (PP (IN in) (NP (DT a) (NN bulb)))))))) (. .)))
An open-end manometer containing water as the working fluid is used to measure the pressure of gas in a bulb.
(ROOT (S (NP (NP (DT The) (NN pressure)) (PP (IN of) (NP (NP (DT a) (NN sample)) (PP (IN of) (NP (NN gas)))))) (VP (VBZ is) (VP (VBN measured) (PP (IN with) (NP (DT an) (JJ open-end) (NN manometer))))) (. .)))