| 摘要 |
<p>An adjustable loading/unloading mouth, comprising: a first tubular element (2), provided with a longitudinal axis (x); a second tubular element (3), provided with a longitudinal axis (y); means for connecting (4, 5, 6) between the first and the second tubular element (2, 3) which means for connecting (4, 5, 6) define a spherical surface (S), provided with a centre (O), and which enable the first and the second tubular element (2, 3) to rotate with respect to one another about the centre (O); wherein the means for connecting (4, 5, 6) comprise at least a first connecting element (4) and at least a second connecting element (5) which are reciprocally connectable at a joining plane (P) passing through the centre (O) of the spherical surface (S) on which the first connecting element (4) and the second connecting element (5) can rotate with respect to one another about the centre (O).</p> |
