Can i withdaw my technical resignation from parent department

In that case you may have to resign from the present job and apply for the previous one operating the lien granted at the time of technical resignation.

already rep;lied in details at https://www.lawyersclubindia.com/forum/can-i-revert-back-to-my-parent-department-if-they-want-as-i-have-technically-resigned-236094.asp