EIUVVB is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Foreign Trade: Reference Structure for EIUV and Dynamic Part" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_EIUVVB TYPE EIUVVB.
The EIUVVB table consists of various fields, each holding specific information or linking keys about Foreign Trade: Reference Structure for EIUV and Dynamic Part data available in SAP. These include MANDT (Client), AHBAS (Basis document category for foreign trade processing), EXNUM (Number of foreign trade data in MM and SD documents), EXPOS (Internal item number for foreign trade data in MM and SD)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .