1. Pierrat M A. Linear drive shaft seal[P]. US patent, 4, 284, 605, 1981.
2. Gowad H L. Ferrofluid linear seal apparatus[P]. US patent, 4502, 700, 1985.
3. Dynamic sealing with magnetic fluid [J];Moscowitz;ASLE,1974
4. Li Decai. The theory and experiment study of magnetic fluid seal[D]. The master thesis of Beijing University of Aeronautics and Astronautics, 1992. (in Chinese))
5. Theoretical and experiment study of serrated form on magnetic fluid sealing [J];Li;Journal of Mechanical Engineering,1996