| 摘要 |
PCT No. PCT/DE90/00199 Sec. 371 Date Nov. 21, 1990 Sec. 102(e) Date Nov. 21, 1990 PCT Filed Mar. 16, 1990 PCT Pub. No. WO90/11410 PCT Pub. Date Oct. 4, 1990.An assembly for removing a liquid phase floating on a surface of groundwater includes a lifting device changing a position of a bucket-shape vessel receiving the liquid phase through an inlet aperture in response to a signal generated by a measuring device monitoring a level of the liquid phase.
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