The German magnetic mine: the first diagrams of its working and the methods by which it is laid. Diagrams showing the delicate electrical mechanism which reacts to the weak magnetic field set up by a metal-hulled ship, and the parachute device for dropping the mine.
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Details
Creative#:
TOP23847883
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
No
Property Release:
No
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No
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