| 摘要 |
The column (2) has a cylindrical body (21) whose stirrup end (3) is of a conical shape (22). The protective hood (4) has a sleeve in the form of bellows (41) whose one end (42), with a throat (421), engages in a countersink (12) in the fork end (1) and has lips (423) on its inside surface which engage with the surface of the column. At the other end is a sealing edge (43), whose inner surface (431) engages with the truncated face (22) of the column and whose lips (4311,4321) engage with the surface (31) of the stirrup (3). |
