Automatic control valves for liquids and gases actuated by pneumatic, hydraulic, or electronic means; and automatic measured sampling machines actuated by pneumatic, hydraulic, or electronic means for gathering samples of crude oil, gas, and light liquids

'actuat':8,20 'automat':1,16 'control':2 'crude':31 'electron':13,25 'gas':33 'gase':7 'gather':28 'hydraul':11,23 'light':35 'liquid':5,36 'machin':19 'mean':14,26 'measur':17 'oil':32 'pneumat':10,22 'sampl':18,29 'valv':3

Metallic high-pressure cylinders used for collection and transportation of compressed gas or liquid samples, sold empty

'collect':8 'compress':12 'cylind':5 'empti':18 'gas':13 'high':3 'high-pressur':2 'liquid':15 'metal':1 'pressur':4 'sampl':16 'sold':17 'transport':10 'use':6

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