dosages

Effects of different dosages of NBPOS bait on their control efficacy to the red imported fire ant,Solenopsis invicta;

氟磺酰胺毒饵使用量对红火蚁防治效果的影响

The Development and Validation of Adolescent Pathological Internet Use Scale;

青少年病理性互联网使用量表的编制与验证

Materials of forged steel roll for cold rolling wide strip and its application;

宽带钢锻钢冷轧辊的材质与使用

Features of all kinds of hard alloy cu ts and its application and mainternance;

硬质合金刀具的特点·使用·维护

Research and application of topside valve house of pump plunger;

抽油泵活塞上阀罩的改进与使用