The mechanism, development, testing and field test of EP DRA are introduced.介绍了EP系列减阻剂的作用机理 、 研制方法 、 中试生产和现场实验的概况.The EP antiwear property is different that it contains different additives.不同的添加剂配伍,聚脲润滑脂的极压抗磨性也不一样.INTECH...
Please move the manhole cover away .请将人孔盖移开。Stainless steel bolts and nuts shall be tightened on manhole covers.人孔盖使用不锈钢螺栓和螺母拧紧.Debus turn head in the manhole 2 to have equipments smoothly entered.在人井2中,将弯头卸下,便于设备进入.How ...