| 摘要 |
<p>The invention relates to a swivel device (50) at a rotator (10) comprising a stator part (20) and a rotor part (30). The swivel device (50) comprises a swivel block (60), an external swivel tube (70) and an internal swivel tube (80). Mounting and demounting of said swivel parts (60, 70, 80) are made through an opening in an upper stator part (20a).</p> |
