Memory slot and printed circuit board and network system

A printed circuit board, comprising:

• a memory slot having a slot and a first and second rows of metal sheets located in the slot, wherein the first row of metal sheets is disposed on a first inner side wall of the slot, the second row of metal sheets is disposed on a second inner side wall of the slot that is opposite to the first inner side wall, and an extension direction of a long side of each of the first and second inner side walls is parallel to a longitudinal direction of the slot;
• wherein the first and second rows of metal sheets comprise a plurality of terminal groups, each terminal group comprises at least one pair of metal sheets, one metal sheet in each pair of metal sheets is located in the first row, the other metal sheet in each pair of metal sheets is located in the second row, and each pair of metal sheets are symmetrically disposed in the slot;
• and
• wherein bending directions of bending pins of a plurality of metal sheets located in a same terminal group are identical, bending directions corresponding to two adjacent terminal groups are opposite, and a bending direction corresponding to a terminal group refers to bending directions of bending pins of a plurality of metal sheets located in the terminal group;
• wherein a pad is disposed at an end of each bending pin;
• wherein solder is disposed on the pad corresponding to the bending pin.

A network system, comprising:

• a memory slot having a slot and a first and second rows of metal sheets located in the slot, wherein the first row of metal sheets are is disposed on a first inner side wall of the slot, the second row of metal sheets is disposed on a second inner side wall of the slot that is opposite to the first inner side wall, and an extension direction of a long side of each of the first and second inner side walls is parallel to a longitudinal direction of the slot;
• wherein the first and second rows of metal sheets comprise a plurality of terminal groups, each terminal group comprises at least one pair of metal sheets, one metal sheet in each pair of metal sheets is located in the first row, the other metal sheet in each pair of metal sheets is located in the second row, and each pair of metal sheets are symmetrically disposed in the slot;
• and
• wherein bending directions of bending pins of a plurality of metal sheets located in a same terminal group are identical, bending directions corresponding to two adjacent terminal groups are opposite, and a bending direction corresponding to a terminal group refers to bending directions of bending pins of a plurality of metal sheets located in the terminal group;
• wherein a pad is disposed at an end of each bending pin;
• wherein solder is disposed on the pad corresponding to the bending pin.