| 摘要 |
Process which comprises, in succession and with the use of a single mould which includes a shell 18 interacting with a shaping core 17, a first stage of injection and crosslinking of polymeric material which forms the structure 11 of the cover and, after rotation of the shaping core, a second stage of overmoulding of the sealing packing (lining) or gasket 12 on the cover by means of injection and vulcanization of the elastomeric material. <IMAGE>
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