| 摘要 |
The device comprises a stopper having an operating head (10), an intermediate portion (12) bearing a sealing ring, and a tail (14) formed with radial ribs which co-operate with slopes in the orifice in which the stopper is to be mounted, a portion (30) of said radial ribs being obliquely oriented so that rotation of the stopper about its axis gives rise to longitudinal translation along said axis. The invention is particularly applicable to devices for bleeding or for emptying the radiators of motor vehicles. |
