1, electronic version. More refers to the file preservation packaging form, which is different from the printed version.

Electronic file is a file that uses computer software such as word, Excel, PP, CAD and photoshop to edit the contents of paper documents. , and can be transmitted by mail, USB flash drive, network or other transmission methods.

Including briefings, newspapers, maps, resumes, invitations, books, certificates, contracts, photos and other electronic formats.

2. Circuit board: The circuit board can be called printed circuit board or printed circuit board, and the English name is Printed Circuit Board)PCB).

Including circuit board, PCB board, aluminum substrate, high-frequency board, thick copper plate, impedance board, PCB, ultra-thin circuit board, printed (copper etching technology) circuit board, etc.

The circuit board makes the circuit miniaturized and intuitive, which plays an important role in mass production of fixed circuits and optimization of electrical layout.

circuit board