| 摘要 |
The kit has a punched spatial components (1) and connectors (2) and an external thread located at outside on a threaded sleeve, and threaded nuts (7) comprising a nuts screw thread that is in active connection with the external thread of the threaded sleeve. An annular groove is located on fix lowering holes opposite to a side surface of a nuts head, where a middle circle diameter of the groove corresponds to diameter of a positioning circle. Width of the annular groove is same as diameter of the fix through-holes in a positioning cylinder. |
