the cleaning devices being entrained discrete elements, e.g. balls, grinding elements, brushes

Full Title

Cleaning hollow articles by methods or apparatus specially adapted thereto > Cleaning pipes or tubes or systems of pipes or tubes > Cleaning the internal surfaces; Removal of blockages > using cleaning devices introduced into and moved along the pipes > moved along the pipes by a fluid, e.g. by fluid pressure or by suction > the cleaning devices being entrained discrete elements, e.g. balls, grinding elements, brushes

Classification Context

Section:

PERFORMING OPERATIONS; TRANSPORTING

Class:

CLEANING

Subclass:

CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL