3. Marker length is not visible in manual system. Marker length is visible in monitor screen at CAD system.
4. In manual, once marker is made, not possible to increase its efficiency. But in CAD it is possible to increase the efficiency at any time.
5. Marker copying is not possible manually. In CAD, by using Plotter as much as possible copy can be done.
6. Manual marker making is very time consuming method whereas, CAD is a faster method.
7. In manual system quality can not be assured. It has quality assurance.
8. Manual system costing is low but CAD is expensive
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