PCB (Printed Circuit Board) or plate circuit printed from copper plates which release coating on electrical insulation materials come to get rid of the copper part, only the parts that you want to connect to the terminal block of the individual electronic devices together by electrical or electronic circuit that has been designed, and then, when the devices are installed on printed circuit plate filled finish is a complete cycle, then it is called PCA (Printed Circuit Assembly) or the PCBA (Printed Circuit Board Assembly).
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