Etchants for use in the manufacture of semi-conductors; etchants for use in the manufacture of printed circuit boards; etching solutions, namely, acids for use in the manufacture of semiconductors; detergents for industrial use as part of manufacturing operations; fluorspar compounds, namely, for use in the manufacture of semiconductors; fluorine; chemicals for use in industry

'acid':24 'board':20 'chemic':52 'circuit':19 'compound':42 'conductor':10 'deterg':32 'etch':21 'etchant':1,11 'fluorin':51 'fluorspar':41 'industri':34,56 'manufactur':6,16,29,39,48 'name':23,43 'oper':40 'part':37 'print':18 'semi':9 'semi-conductor':8 'semiconductor':31,50 'solut':22 'use':3,13,26,35,45,54

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