https://www.epo.org/de/boards-of-appeal/decisions/t940984eu1
T 0984/94 (Vacuum apparatus/BOC) vom 17.06.1997
vacuum apparatus17 0694bocvom
https://www.usgs.gov/publications/vacuum-hand-pump-apparatus-collecting-water-samples-a-horizontal-intragravel-pipe
Vacuum hand pump apparatus for collecting water samples from a horizontal intragravel pipe | U.S....
We describe a lightweight, portable vacuum hand pump apparatus for use in collecting water samples from horizontal intragravel pipe samplers buried in the...