RELATION BETWEEN TABLES

Hi friendz,

i am working on smartform

i need to retreive the data from the below given tables.

i tried to find the relationship between these tables but not able to find .

could u plz suggest me what may b the relation between these three tables.

Must have the ability to print a handling unit label for each completed handling unit printing the following fields:

Handling Unit number (<b>VEKP-EXIDV</b>)

Process order Number (<b>VEVW-OBJKEY</b> or strip the first seven digits of the HU number)

Phase Description (Read <b>AFVC-LTXA1</b> for process order number and phase equal last four digits of HU number)

regards,

siri.