An adhesive dike slot (31) is formed around the joint concave bottom, thus preventing the main body and the neck back side from dirtiness caused by excessive adhesive overflow.
粘合剂堤槽(31)形成在接合凹底部的周边，以防止用粘合剂连接时过量粘合剂溢出弄脏主体及琴颈的背面。
2
The crucial part of overflow earth dike is erosion prevention for flowing surface.