Ultrasonic-welding meaning

The bonding of materials, typically made of plastic, by pressing them together and vibrating them at ultrasonic speeds for a fraction of a second. It is a very fast, very clean way to combine objects together. First used to bond toy parts in the 1960s and widely used in the automobile industry starting in the 1980s, ultrasonic welding is used to weld myriad plastic elements together. See ultrasonic.
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