Bz serial can purify degraded oil while transformer , instrument transformer and oil switch are operating and remove acidic substance , free carbon , coloring matter and deposited polluted substance but that fundamental components and antioxygenic property of oil to achieve functional performance of degrade oil up to national standard 它能在变压器互感器油开关正常运行的情况下，对劣化油进行净化处理，有效除去油中的酸性成分游离碳色素沉淀污染物质，而不损伤油的基本成分和抗氧化性能。
Second , adopting the linearity of oil film of the guide bearings , the transient response of the shafts is computed and analysis by integrating with willson method . because of the uncertain position of the shafts in the guide bearing , the model and solution method of nonlinear transient response of the shafts is discussed 然后结合willson数值积分法，采用线性化油膜力，对机组轴系的线性瞬态响应进行了计算分析，根据机组轴系在瞬态响应中运动的不确定性，给出了由导轴承油膜力非线性所引起的主轴系统的非线性瞬态响应的建模及求解方法。
