Calcutta Telephone System: Conversion to Automatic Working

Keywords	Transformer Switchgear Fuel Oil Vela Distribution Frame Rectifiers Power Board Battery
Ministry/ Department/ Residency	Ministry of Communication
Branch	Directorate General of Posts and Telegraphs
From Year / Date (YYYY-MM-DD)	NA
To Year / Date (YYYY-MM-DD)	NA
Source Organization	NA
Identifier	NAIDLF00102429
File No./Reference No./Sheet No./Folio No.	S.B. 3/5
Location	R2
Part No.	NA
File Size	21.2 MB
Pages	13
Call Number	NA
Publisher	NA
Subject	NA
Creator	NA
Accession Number	NA
Series	NA
Year of Publication	NA
Language	English
Bundle Barcode	NAIDLB00004504
Location Code	004-0-017-001-02-14
File Barcode	NAIDLF00102429
QC Certificate No.	QC_20240708DL
Bundle No.	613