AUTOMATIC BLOCK SECTION, UNIFIED SUBSIDIARY RULE (USR)9.12, T/A 912,T/B 912,TC 912,TD 912,TE912

[@RanjitSingh-j1x]

Quiet clear sir आज समझ आया सर,,🙏🙏

[@दुनियादारीok]

Nice information sir👌

[@maheshbarmanofficial7687]

Very good presentation ❤

[@ClassRoom-railway]

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[@AMITKUMAR-ms1ii]

Informative..,👌

[@ClassRoom-railway]

Thanks

[@ravishankarprasad9308]

Nice information

[@ClassRoom-railway]

Thanks

[@anupkumardas6276]

Nice

[@ClassRoom-railway]

Thanks