: In US tax procedures, RAR refers to a Revenue Agent’s Report , which summarizes an IRS agent's findings after an audit.
: While the RAR format itself is secure, the contents can be malicious. It is recommended to use antivirus software like Avast to scan archives before extraction. 21201.rar
: This is a roadway section within a deep coal mine (specifically associated with the 21201 working face) used to study the stability of surrounding rock under high pressure. : In US tax procedures, RAR refers to
: Significant deformation was noted, with floor heave typically appearing 2 days after excavation , reaching amounts of 300–400 mm . : This is a roadway section within a
The file (or RAR 21201 ) primarily refers to a specific underground coal mine roadway discussed in geotechnical and engineering studies regarding deep mining stability.