... buna N 丁腈橡胶 buna S 丁苯橡胶 buna 丁钠橡胶 ...
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Buna-S 丁苯橡胶
Buna-S rubber 布纳
perbunan , styrene butadiene rubber
It has reopened investigations into state aid paid to a German chemical company, Buna, as a sweetener to its prospective purchaser, America's Dow.
ECONOMIST: State aid
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