the cleaning devices having motors for powering cleaning tools

Full Title

Cleaning hollow articles by methods or apparatus specially adapted thereto > Cleaning pipes or tubes or systems of pipes or tubes (apparatus for cleaning metal pipes by chemical methods C23G3/04) > Cleaning the internal surfaces; Removal of blockages > using cleaning devices introduced into and moved along the pipes > moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes > the cleaning devices having motors for powering cleaning tools