Hello Manikandaraja,
This looks like you are asking for the same Business functions provided in EHP5 under the name LOG_EAM_OLC .
Also read this sap help In this functionality we can have operations and costing against equipments which means your sub-equipments. If yours is not this EHP, I doubt this requirement can be fulfilled through Objects tab of the Order.
Regards
KJogeswaraRao