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hélium mstresses
chem. гелий (Не)
met. Не; гелий
tech. хладагент R 704
hélium: 53 phrases in 19 subjects
Astronautics3
Astronomy1
Automated equipment1
Aviation5
Chemistry2
Electronics4
Food industry1
Geology2
High energy physics6
Medical appliances1
Metallurgy1
Meteorology1
Natural resourses and wildlife conservation1
Oil and gas technology1
Physics5
Radio5
Technology9
Welding3
Радиоактивное излучение1