Boucle yarn is a specialized type of yarn that is usually made of three plies. Among the three plies used to create this yarn, one thread is usually looser than the others. The looser thread causes the yarn to have a rough feeling and a bulky look. This also makes it more likely to unravel than some other types of yarn.
Cold Metal Transfer - CMT - A Revolution in Mechanized Root Pass Pipeline Welding. CMT is the abbreviation for Cold Metal Transfer. The CMT process was originally intended for use as a method for joining thin gauged materials in the automotive industry. In 2006 CRC-Evans initiated an investigation to understand if this technology was suitable for root pass deposition on pipeline girth welds.
Also found in: Acronyms, Wikipedia. Heat transfer. Heat, a form of kinetic energy, is transferred in three ways: conduction, convection, and radiation. Heat transfer (also called thermal transfer) can occur only if a temperature difference exists, and then only in the direction of decreasing temperature. Beyond this, the mechanisms and laws governing each of these ways are quite different. See Conduction (heat), Convection (heat), Heat radiation. By utilizing a knowledge of the principles governing the three methods of heat transfer and by a proper selection and fabrication of materials, the designer attempts to obtain the required heat flow.