Apparatus for [ recording, ] transmission or reproduction of sound [ and images, ] namely, loudspeakers and parts thereof; accessories for the aforementioned items, namely, [ electric wires and cables and ] electric impedance transformers necessary for interconnecting or connecting the aforesaid goods

Preamplifiers and Amplifiers

Gas scrubbers; sewage treatment and sewage disposal plants; water purification units; water desalination plants; water purifying apparatus and machines; apparatus and machines for purifying air for industrial use; furnaces; separators for cleaning and purification of air; separators for cleaning and purification of gases; waste water purification units; water conditioning units; bioreactor for use in the treatment of sewage, wastewater, and waste; thickening and dewatering machines for use in...