that can incandesce for hours. learn more ge research lab's william coolidge creates the tungsten filament. learn more coolidge develops the first enclosed x-ray source, the inspiration for many x-ray devices that are used to determine the physical makeup of materials. learn more ge researcher katharine...
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nurel adds colourants directly to the polyamide polymer during the spinning process; colour is distributed in a homogeneous way and remains unalterable during the garment lifetime. fabrics made of coloured yarn, do not require any dyieing process and so save energy and reduce the use of chemical products...