chemicals and photoresist chemicals for use in the manufacture of printed circuit boards and other electronic devices and for use in metal plating

'board':13 'chemic':1,4 'circuit':12 'devic':17 'electron':16 'manufactur':9 'metal':22 'photoresist':3 'plate':23 'print':11 'use':6,20

machines used to manufactured semiconductor substrates, silicon chips, silicon wafers and microelectronic semiconductor substrates

'chip':8 'machin':1 'manufactur':4 'microelectron':12 'semiconductor':5,13 'silicon':7,9 'substrat':6,14 'use':2 'wafer':10

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