Instruction in Army Telegraphy and Telephony Volume II - Lines, 1914 - Chapter 4 Figure 1

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Description

Figure of Barrows Drum Universal Mark I from Instruction in Army Telegraphy and Telephony Volume II - Lines, 1914.

File usage

The following 2 pages link to this file:

• Barrows Drum Universal
• Instruction in Army Telegraphy and Telephony Volume II - Lines, 1914