Samples Corner reflector Used as a reflector in the field, to respond to satellite signals. It serves to identify if there are processes of abatement taking place. RETRO-Reflector For use in satellite technique. Anti-vortex baffle Geophone attachment Measuring technology in tunnel Pipe attachement upper picture: blank, lower picture: eloxiert For use in boreholes Choke ring upper picture: front, lower picture: back High pressure cell Impeller Flood cell Telluric electrode