| 摘要 |
<p>A pumping system which includes two pressure vessels each of which has an internal flexible bladder, a water manifold, a pump for pumping water trough the water manifold alternately into the bladders, a slurry manifold through which slurry is expelled alternately from each vessel as the bladder is expanded and a control system which pressurises one bladder with water shortly before the other bladder is fully collapsed, and vice versa.</p> |
