| 摘要 |
<p>1. A volute casing for fluid flow machines characterised in that it comprises two casing halves (1, 2) which are semicircular in plan view, with different radii, which are connected together in a position of being displaced relative to each other along their diameter in such a way that at one end (E) of the common diameter (D) they have a common tangent (T).</p> |
