| 摘要 |
<p>The bolt has a coupling section provided at an end that lies within a tubular blasting protection unit (18), for coupling a measuring instrument, where the bolt is formed by a screw thread rod portion. An external thread extends over a part of length of the bolt such that the protection unit is screwable on the external thread. The protection unit is formed in a pot-shape with a cylindrical shell (20) and with a pot base (22) that is directed transverse to a cylinder axis. A threaded bore (26) is formed in the pot base for screwing the protection unit onto the external thread of the bolt.</p> |
