printed teaching materials, namely, manuals in the fields of science and technology

'field':8 'manual':5 'materi':3 'name':4 'print':1 'scienc':10 'teach':2 'technolog':12

Educational electronic scientific set comprising a seismometer for measuring ground motion, an elf receiver for measuring extremely low frequencies of earth and an air quality meter for measuring carbon monoxide and dust

'air':24 'carbon':29 'compris':5 'dust':32 'earth':21 'educ':1 'electron':2 'elf':13 'extrem':17 'frequenc':19 'ground':10 'low':18 'measur':9,16,28 'meter':26 'monoxid':30 'motion':11 'qualiti':25 'receiv':14 'scientif':3 'seismomet':7 'set':4

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