Mechanical seals are mechanisms that are used to prevent fluid leakage.Since the seal surfaces are in contact with one another, hydrodynamic and contact forces are functions of surface roughness.Additionally, since the lubrication regime under specific operating conditions such as low speed or high load causes the seal to operate in the mixed lubri
In recent years, with the increasing difficulty cubs foam finger of foundation pit projects, the frequency of leakage accidents has also increased.In order to ensure that the excavation of foundation pits is carried out smoothly, water-stop curtains are generally used to protect the foundation pit.Once leakage occurs in the water-stop curtain, it w
Understanding the impact of production, environmental exposure and age characteristics on the reliability of a population is frequently based on underlying science and empirical assessment.When there is incomplete science to prescribe which here inputs should be included in a model of reliability to predict future trends, statistical model/variable