| 摘要 |
PCT No. PCT/EP93/03036 Sec. 371 Date May 3, 1995 Sec. 102(e) Date May 3, 1995 PCT Filed Oct. 30, 1993 PCT Pub. No. WO94/10449 PCT Pub. Date May 11, 1994A bore-hole pump for pumping a highly viscous fluid, into which is fed a solvent which has a low viscosity and which is miscible with the fluid. A shutoff device is disposed between an inlet of the bore-hole pump and an actual inlet of the pump part. The shut-off device is activated by the solvent. |
