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-锆复合溶液作基体改进剂，锆涂层热解石墨管为原子化器。

Chemigum and Sunigum : elastomeric modifiers for plastics.

用于塑料弹性体改性剂。

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、脱水液氨、载体纳米二氧化硅及改性剂乙氧丙烷制备出氨钙体系催化剂。