The design was successful and led to the development of the similar Class NUMBER@1 and Class NUMBER@2 units for use by ORGANIZATION@1 and ORGANIZATION@2 -LRB- now used by ORGANIZATION@3 -RRB- respectively .

The design was very successful and led to the development of the similar Class NUMBER@1 and Class NUMBER@2 units for use by ORGANIZATION@1 and ORGANIZATION@2 -LRB- now used by ORGANIZATION@3 -RRB- respectively .
