A sectional connector includes a main connector having pins in two rows, one or more first sub-connector having pins in one row, and a second sub-connector having pins in one row, sequentially connected through engagement of dovetail grooves and dovetail tenons correspondingly provided on side surfaces of the main connector and the sub-connectors in contact with one another. The sectional connector may substitute for conventional PC104 and PC104 PLUS industrial computer connectors having pins in 2+2 rows and pins in 2+2+4 rows, respectively, for connecting buses. Number of the first sub-connectors used in forming the sectional connector could be changed, depending on actual need in designing an industrial computer. The sectional connector enables easy and firm connecting and soldering of pins to a PC board row by row.
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