| 摘要 |
PURPOSE: A multistage sleeve is provided to supply multistage sleeve with same length by fixing an upper body combining protrusion to a lower body multistage groove. CONSTITUTION: A multistage sleeve comprises a sleeve bottom body(10) and a sleeve top body(20). A multi-layered groove(11) of stepped is formed on the top circumference of the sleeve bottom body. A plurality of combining projections(25) is formed on the circumferential surface center part circumference of the sleeve top body. A bonding groove is formed on the multi-layered groove of the sleeve bottom body. A jaw(22) is formed on the inner circumference of the sleeve top body. |
