electrical and electronic apparatus, devices and instruments for weighing, measuring, counting, recording, monitoring, and testing of microscopic and sub-microscopic particles namely open and closed-loop control and switching apparatus; optical switchgear and controls; lasers for working with microscopic and sub-microscopic particles; machines for producing particles sized and tested in nanometer and angstrom ranges

'angstrom':57 'apparatus':4,32 'close':27 'closed-loop':26 'control':29,36 'count':11 'devic':5 'electr':1 'electron':3 'instrument':7 'laser':37 'loop':28 'machin':47 'measur':10 'microscop':17,21,41,45 'monitor':13 'name':23 'nanomet':55 'open':24 'optic':33 'particl':22,46,50 'produc':49 'rang':58 'record':12 'size':51 'sub':20,44 'sub-microscop':19,43 'switch':31 'switchgear':34 'test':15,53 'weigh':9 'work':39

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