| 摘要 |
The accessory is based on a bushing formed by two parts (12 and 13) and an inner ring (15), the latter having a frustoconical outer shape, while inside it has a serrated annular protuberance (16). The two parts (12 and 13) are coupled together by means of a screw thread (17), such that the assembly is retained by the insertion of a flange (18) of the part (12) in a recess made for that purpose in an inner element called a nipple that is used in known push-fit coupling systems, on the basis of which coupling takes place by sliding.
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