Electrical switching and control devices, namely, electrical ignition and flame monitoring devices, heat, time and temperature controllers for electrical welding processes, melting, inertization, purging, water treatment, generation of controlled atmospheres in ovens or furnaces, and for oxyfuel cutting, welding, brazing, heating and metal spraying; checking, alarm and controlling devices for gas supply systems, namely, electronic valves for controlling gas supply, gas alarms, gas testing ins...

Spectrometers

Spectroscopic Instrument Systems Comprising Meter Grating Spectrograph, D.C. Arc Source, Multi-Purpose Arc Stand, Roll-Film Tank, and Microphotometer for Use in Spectrochemical Analysis and Training

VARIOUS PRECISION OPTICAL COMPONENTS INCLUDING LENSES, PRISMS, MIRRORS, AND THE LIKE AND ALSO OPTICAL INTERFERENCE FILTERS OF VARIOUS TYPES

Semiconductor Solar Cells, Photoelectric Converters for Converting Light Energy into Electrical Energy, Solar Simulators, [ Tunnel Rectifiers ] Diodes, [ Controlled Rectifiers, Photovoltage Readout Devices, ] [Photodiodes, Photoswitches, Photoconductive Cells, Optical Acquisition Apparatus, IR and UV Detection,] [ Guidance, and Communication Apparatus ]