[ Analysis for third persons, namely, chemical analysis, and physical analysis, namely, testing the composition of metals; material testing ]

'analysi':1,7,10 'chemic':6 'composit':14 'materi':17 'metal':16 'name':5,11 'person':4 'physic':9 'test':12,18 'third':3

Measuring apparatus, namely, mass spectrometers, x-ray spectrometers, optical spectrometers, ultraviolet spectrometers; spectrometers

'apparatus':2 'mass':4 'measur':1 'name':3 'optic':10 'ray':8 'spectromet':5,9,11,13,14 'ultraviolet':12 'x':7 'x-ray':6

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