The Experiments were carried out to study the relationship dynamics of Aphis craccivora population and Vicia faba between physiological stress on the basis of plant-insect experimental system.
本文以蚕豆和蚕豆蚜构成的人工种间关系系统为对象，研究了蚜虫种群动态和植物生理变化的关系。
Discusses the existing problems of slime dense medium system in Xiqu coal mine preparation plant, points out the solved methods, provides experience for preparation plant improving.
探讨了西曲矿选煤厂煤泥重介系统存在的问题，提出了具体的解决办法，为选煤厂改造提供经验。
To reduce medium consumption, a series of transform were carried out in heavy medium system in Taoshan coal preparation plant.
为了降低介质消耗，桃山选煤厂在重介质系统中进行了一系列的改造。
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