In 5G New Radio (NR) systems, the is a critical message (Msg2) in the initial network access procedure.
This is the most direct match for the number "53133." These documents detail the requirements for 5kW tactical, quiet, diesel engine-driven generator sets.
If "53133.rar" is a specific compressed file you are trying to handle, it is a format.
Could you clarify if you are looking for a or if "53133" refers to a specific document ID ? RAR | Fimo
If you are looking for a "paper" (technical document, manual, or specification) related to these terms, here are the most relevant sources: 1. Military Specifications (MIL-G-53133)