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electron ray
space	电子射线
tech.	电子束

electron ray : 52 phrases in 16 subjects

Biotechnology	1
Chemistry	6
Earth sciences	5
Ecology	1
Electronics	8
Engineering geology	1
General	5
Geology	6
Geophysics	1
Metallurgy	4
Nuclear physics	2
Polygraphy	1
Space	3
Technology	5
Telecommunications	1
Textile industry	2