[ Laboratory apparatus and instruments for the exchange of substances and heat ]

'apparatus':2 'exchang':7 'heat':11 'instrument':4 'laboratori':1 'substanc':9

[ Apparatus for the exchange of substances and heat for use in the production of steam, for use in cooking, and for use in refrigeration ]

'apparatus':1 'cook':19 'exchang':4 'heat':8 'product':13 'refriger':24 'steam':15 'substanc':6 'use':10,17,22

[ Distillation columns, rectification columns, absorption columns, desorption columns, extraction columns for industrial use; separation columns for substances and parts therefor for industrial use; and column fillings, ] column trays [, and structured column packings ] for use in separation columns all used as industrial machinery

'absorpt':5 'column':2,4,6,8,10,15,25,27,31,37 'desorpt':7 'distil':1 'extract':9 'fill':26 'industri':12,22,41 'machineri':42 'pack':32 'part':19 'rectif':3 'separ':14,36 'structur':30 'substanc':17 'therefor':20 'tray':28 'use':13,23,34,39

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