Useing unsaturated urethane , 2 - ethylhexyl acrylate, crosslinking agent, high oil - absorbent resin was prepared by suspension polymerization.用不饱和氨基甲酸酯 、 丙烯酸异辛酯和交联剂, 以悬浮聚合的方法制备高吸油性树脂.Ferric sulfate was first used for t...
The pendulum has swung back and the American car companies have made dramatic advances in safety...三十年河东，三十年河西，美国汽车公司在安全方面已经取得了巨大进步。The sail of the little boat swung crazily from one side to the other...小船的帆猛烈地左右摇摆着。Broa...