Beacons, luminous; Educational apparatus, namely, blocks used as teaching aids for modeling chemical compounds, visualization of math concepts; Electronic components in the nature of capacitors, connectors, filters, oscillators, relays, switches, transformers, resistors, semiconductors, integrated circuits, rectifiers, transistors; Electronic integrated circuits; Printed circuit boards (PCBs); Radio receivers; Semiconductor devices; Speaker enclosures; Surveying machines and instruments; Time clocks

'aid':10 'apparatus':4 'beacon':1 'block':6 'board':43 'capacitor':25 'chemic':13 'circuit':35,40,42 'clock':56 'compon':20 'compound':14 'concept':18 'connector':26 'devic':48 'educ':3 'electron':19,38 'enclosur':50 'filter':27 'instrument':54 'integr':34,39 'lumin':2 'machin':52 'math':17 'model':12 'name':5 'natur':23 'oscil':28 'pcbs':44 'print':41 'radio':45 'receiv':46 'rectifi':36 'relay':29 'resistor':32 'semiconductor':33,47 'speaker':49 'survey':51 'switch':30 'teach':9 'time':55 'transform':31 'transistor':37 'use':7 'visual':15

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