| 摘要 |
<p>The spacer (1) has a set of circular sections (8) corresponding to a set of external pipes (3) of a pipe bundle (2), where the circular sections are connected with each other by rod-shaped connection parts (9). The circular sections partially enclose external pipes at external side in a form-fitted manner. Each circular section has a radially outward extending rib-shaped spacer part (11) for centrally supporting the pipe bundle inside an earth borehole.</p> |
