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1. An adapter board, configured to realize adaptation between a connector (5) and a board card (6), comprising a main body (1), wherein perforations (2) are provided in a top face of the main body (1), and the perforations (2) are configured to be in plug-in fit with a plug of the connector (5); pads (3) are provided on a bottom face of the main body (1), and the pads (3) are configured to be soldered to the board card (6); row numbers, represented by r, and column numbers, represented by n, of the perforations (2) and the pads (3) are the same, and the perforations (2) have a one-by-one correspondence with the pads (3); the main body (1) further comprises a line passing area located between two adjacent columns of pads (3); and a column spacing of the perforations (2) in the top face of the main body (1) is represented by P, and a column spacing of the pads (3) on two sides of the line passing area is represented by M, wherein M−P>H, and H represents a minimum spacing allowed between adjacent differential lines (7) of the board card (6).
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