| 摘要 |
PCT No. PCT/SE92/00388 Sec. 371 Date Dec. 7, 1993 Sec. 102(e) Date Dec. 7, 1993 PCT Filed Jun. 5, 1992 PCT Pub. No. WO92/21879 PCT Pub. Date Dec. 10, 1992A pump arrangement having a mechanical pump in series with a vacuum compartment on an inlet side of the mechanical pump. The vacuum compartment has a suction line flow connected to the supply of liquid to be pumped and draws that liquid by vacuum to the inlet of the mechanical pump. The mechanical pump includes an outlet for delivering the liquid to be pumped. |
