Housings of metal and/or plastic, namely, housing enclosures specially adapted for general use with electrotechnical and electronic devices, namely, laboratory instruments and apparatus for the exchange of substances and heat, programmable logic controllers, electric control panels, lighting control panels, photometers, ammeters, DC potentiometers, inclinometers, temperature meters, watt meters, current meters, resistance measuring instruments, conductivity meters, electroplating apparatus fo...