Farmers in France cultivating the ground after World War One were finding unexploded projectiles. In this drawing you can see a operator with a telephone receiver (microphone) searching the once battlefields. When the apparatus approaches metal the equipment gave off a sound to indicate a buried bomb. Date: 1919

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Details

Creative#:

TOP28578066

Source:

達志影像

Authorization Type:

RM

Release Information:

須由TPG 完整授權

Model Release:

No

Property Release:

No

Right to Privacy:

No

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Same folder images