Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal pipe collars; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; petrochemical metal pipes; boiler metal pipes; metal exchanger pipes and metal tube exchanger pipes; metal drilling pipes; steel and metal pipes and vessels used for transporting oil and fuel; metal tubes used in autoparts and safety devices

'autopart':69 'boiler':39 'collar':20 'devic':72 'drill':51 'exchang':43,48 'fit':11 'fuel':64 'includ':7 'joint':17 'junction':22 'line':27,31 'metal':3,13,18,21,26,30,33,37,40,42,46,50,55,65 'mother':34 'oil':62 'part':9 'petrochem':36 'pipe':4,14,19,24,28,32,35,38,41,44,49,52,56 'safeti':71 'seamless':25 'steel':1,53 'therefor':12 'transport':61 'tube':6,16,47,66 'use':59,67 'vessel':58 'weld':29

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