Gas analysis apparatus for detecting and determining multiple unknown substances in the air, industrial areas, or gas samples, namely, breakable glass detector tubes and a hand-operated gas sampling pump sold as a unit; breakable glass tubes for the qualitative analysis of unknown gases and for determining multiple unknown substances in the air, industrial areas, and gas samples

'air':13,54 'analysi':2,42 'apparatus':3 'area':15,56 'breakabl':20,36 'detect':5 'detector':22 'determin':7,48 'gas':1,17,29,58 'gase':45 'glass':21,37 'hand':27 'hand-oper':26 'industri':14,55 'multipl':8,49 'name':19 'oper':28 'pump':31 'qualit':41 'sampl':18,30,59 'sold':32 'substanc':10,51 'tube':23,38 'unit':35 'unknown':9,44,50

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