Polymer film used for manufacturing electronic circuits; polymer films for acoustic applications, namely, polyetherimide films for loudspeaker membranes; separation and filtration membranes, namely, semi-processed plastics in the nature of filtering materials for ultra-filtration in medicine and scientific research applications

'acoust':11 'applic':12,43 'circuit':7 'electron':6 'film':2,9,15 'filter':32 'filtrat':21,37 'loudspeak':17 'manufactur':5 'materi':33 'medicin':39 'membran':18,22 'name':13,23 'natur':30 'plastic':27 'polyetherimid':14 'polym':1,8 'process':26 'research':42 'scientif':41 'semi':25 'semi-process':24 'separ':19 'ultra':36 'ultra-filtr':35 'use':3

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