“Depressants”简单造句，Depressants造句子

Synthesis and Evaluation of Pour Point Depressants for Daqing Diesel Oil;

Research Progress and Discussion of the Performance Mechanisms Between Pour Point Depressants and Wax in Waxy Crude Oils

Study on Preparing, Evaluating Capability and Exploring Mechanism of the Pour Point Depressants and Viscosity Reducers in Crude Olis;