Valves as machine components; Parts of oilfield wellhead machines, namely, gate valves, ball valves, check valves, plug valves, globe valves, choke and manifold industrial pumps, pump and valve parts, pipe fittings and flanges; Springs being parts of machines

'ball':13 'check':15 'choke':21 'compon':4 'fit':31 'flang':33 'gate':11 'globe':19 'industri':24 'machin':3,9,38 'manifold':23 'name':10 'oilfield':7 'part':5,29,36 'pipe':30 'plug':17 'pump':25,26 'spring':34 'valv':1,12,14,16,18,20,28 'wellhead':8

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