| 摘要 |
The system is assembled of a plug element (10) to be joined to the operation table, a section (14) for holding an attachment, and at least two swivel arms (16, 18) with lockable joints (20) positioned between them. Each of the joints (20) comprises two serrated disks (22, 38) surrounded by serrated rings (30) engaging when a tensioning screw (24, 48) operated with a knurled handle (46) is tightened and keeping the attachment precisely in the required position. |
