摘要 |
<p>Coupling comprises a first end (2B) forming a given angle with the threaded end (4) which receives a locknut (8) and a coupling piece (9). The thread is interrupted for a seal (7) and a washer (6) to be fitted, so that the seal is applied to the piece under the action of the locknut. An Independent claim is also included for the coupling used in the method.</p> |