RSP/TT-UK CYCLONE CITY SUCKER PROVES ITS WORTH What is thought to be the first cyclone design City Suction Excavator recently carried out trials throughout the UK on various National Grid and other contractors inner city jobsites. The trials were to prove the capabilities of the new TT-UK/RSP Suction Excavation technology, particularly useful when digging down and exposing buried pipe and cables in congested highways and pavements.moreTT ON TRACK TT-UK in collaboration with the designers and manufacturers of the high quality RSP Suction Excavatorsmore