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in autocad PURGE command is very usefull, because unwanted object we can remove from file, which we cannot see....after purge your file is no longer, bytes reduice. ok
good luck
Purging the Pipeline to Reduce the Oxygen Content (O2).
Some materials are resistant to corrosion, as in the case of pipes (Purging for Pipe). Cleaning or eliminating any undesirable particles or components, would be the most correct for prevention. After all, we do not need any particle or composite estrane to interrupt the initial process, and compromise the required quality parameters.
Thank you Mohammed for the answer yes its correct to remove unwanted objects.