modifier GRE四级六级

Tartrate solution and zirconyl chloride were used as the matrix modifier for coating graphite tube.

采用酒石酸-锆复合溶作基体改进，锆涂层热解石墨管为原子化器。

Calcium ammine catalyst was prepared with metal calcium,dehydrated liquid ammonia as raw materials,nano-silica as a carrier and acetonitrile and propylene epoxide as modifiers.

采用金属钙、脱水、体纳米二氧化硅及改性乙腈与环氧丙烷制备出钙体系催化。

Chemigum and Sunigum : elastomeric modifiers for plastics.

用于塑料的弹性体改性。