1AE GOETZE GMBH: (Piston Ring Manual). April 2003.
2RIKEN CORPORATION: (PISTON RING ANDSEAL RING HAND BOOK). 1988.10.
3帝国活塞环株式会社.《TP材料规格》[Z].,1982..
4NIPPON PISTON RING CO., LTD(GUIDE TO ENGINEERING MATERIAL).
5AE GOETZE GMBH: (Piston Ring Manual). November 1998.
6Wang Hui,Zhang Jihong.An Algorithm of Edge Detection Based on Entropy Operator[J].Transactions of Nanjing University ofAeronautics & Astronautics,1999,16(1):19-23.