The secretary general of the Organization of Petroleum Exporting Countries (OPEC) said recently that US economic sanctions against Venezuela have affected global energy supplies. He told Venezuelan media that the ECONOMIC sanctions imposed by the Uni…
Application of seal on oil film bearingof rolling mill Oil film bearing is also called liquidfriction bearing. In the process of rolling the mill, liquid lubrication isused to form a complete pressure oil film between the cone sleeve and bushing.The…
The Sodium salt of Polynaphthalene sulphonic acid has excellent colloidal properties. It does not have any surface activity like penetrating foaming and is attracted to polyamide and proteins, but not cotton, hemp or other fibers. About the Sodium…