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环二烯
oil cyclic diolefine
tech. cyclical diolefine
环二烯: 230 phrases in 16 subjects
Agriculture1
Automobiles1
Aviation1
Chemistry67
Electronics2
General64
Metallurgy6
Oil / petroleum9
Oil processing plants1
Perfume32
Pharmacology9
Plastics4
Polymers17
Space2
Technology10
Water resources4