磁流体密封技术
magnetic liquid seals technology
磁性流体密封技术
magnetic fluid sealing technology
单流环式密封油系统
single-ring type sealing oil system
离心式磁流体密封
centrifugal seal of magnetic fluid
流体密封总成安装
hydrodynamic seal assembly installation
活动式密封油挡
the activity type sealed oil blocking
active-type sealed oil blocking