| http://www.w3.org/ns/prov#value | - llar part (30); a second nest (44) for a second lower collar part (46), which nest has a form which is at least partially identical to the form of said second lower collar part (46) and is arranged above these devices and can be lowered towards them; and a holding device which is arranged above and can be lowered on to the second nest (44). 8.
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