Voltmeters; Educational apparatus, namely, blocks used as teaching aids for modeling chemical compounds, visualization of math concepts; Electrical circuit boards; Electron microscopes; High-frequency switching power supplies; Integrated circuit modules; Lead-free solders in the electronics industry; Oscillographs; Voltage regulators; Voltage stabilizing power supply

'aid':9 'apparatus':3 'block':5 'board':20 'chemic':12 'circuit':19,30 'compound':13 'concept':17 'educ':2 'electr':18 'electron':21,38 'free':34 'frequenc':25 'high':24 'high-frequ':23 'industri':39 'integr':29 'lead':33 'lead-fre':32 'math':16 'microscop':22 'model':11 'modul':31 'name':4 'oscillograph':40 'power':27,45 'regul':42 'solder':35 'stabil':44 'suppli':28,46 'switch':26 'teach':8 'use':6 'visual':14 'voltag':41,43 'voltmet':1

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