M/S. Ravi Engineering & Enterprises utilizes several key machines and performs specific operations to deliver its industrial engineering services in Nagpur. The business offers extensive machining capabilities using a range of manual and CNC equipment. 

Detailed List of Services and Machines

The following machines and services are explicitly offered by the Nagpur branch of Ravi Engineering & Enterprises:

Boring Machine Work: Services using boring machines are provided for precise internal diameter enlargement or finishing of components.

Surface Grinding Works: The company performs surface grinding, a process that provides a fine finish and precise dimensions to flat surfaces of a workpiece.

Tooling Grinding Work: This service focuses on sharpening or shaping various cutting tools, ensuring optimal performance for other machines.

CNC Job Work / CNC Lathe: They specialize in Computer Numerical Control (CNC) work, which likely includes operations on CNC lathes for automated and highly accurate turning of parts.

Lathe Machine Work (up to 20m): This highlights a significant capability for large-scale production, offering general lathe work for components up to 20 meters in length.

Milling Machine Work: Standard milling services are available, which involve using rotary cutters to remove material from a workpiece to create specific shapes and features.

Machine Maintenance: In addition to manufacturing and job works, the enterprise offers machine maintenance services, potentially for in-house equipment or clients' machinery. 

Other machines you mentioned, such as Shaper machines, Automesh machines (likely automated mesh machines), slotting machines, and radial machines (radial drilling machines), were not explicitly listed as services or in-house machines for the Nagpur M/S. Ravi Engineering & Enterprises based on available business profiles. Other "Ravi Engineering" entities in India do deal in some of these machines as manufacturers or suppliers, but that information pertains to different businesses.