Parts of oil and/or gas wellhead machines, namely, [ tubing head adapters, flanges, casing heads, ] cross and tees, [ tubing head threaded bottoms, ] tubing heads [, tree cap bottom hole test adapters, and parts therefor ] ; machine valves, namely, gate valves [, ball valves, and parts therefor ] ; hydraulic valve actuators and parts therefor [ ; pneumatic valve actuators and parts therefor ]

'actuat':45,51 'adapt':11,29 'and/or':4 'ball':38 'bottom':21,26 'cap':25 'case':13 'cross':15 'flang':12 'gas':5 'gate':36 'head':10,14,19,23 'hole':27 'hydraul':43 'machin':7,33 'name':8,35 'oil':3 'part':1,31,41,47,53 'pneumat':49 'tee':17 'test':28 'therefor':32,42,48,54 'thread':20 'tree':24 'tube':9,18,22 'valv':34,37,39,44,50 'wellhead':6

metal valves not being parts of machines, namely, gate valves, ball valves, and parts therefor

'ball':11 'gate':9 'machin':7 'metal':1 'name':8 'part':5,14 'therefor':15 'valv':2,10,12

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