mudassar,
First you need to understand the architecture of SAP. What the earlier posts told you are the answers, which will not be understood easily unless you study the relations between fields, table and structures. In otherwords it is a basic pre-requisite to ask queries like this. After you attain that knowledge then your query will become more meaningful like:
Which are the tables which host fields STRNO, EQUNR, ABCKZ, EBELN. Then replies like one from Prashant would attract the 'Correct answer' marking.
To add to Prashant's reply: EBELN comes from table EKKO.