Camera system developed for inspection of drainage lines includes small 35 mm camera with 50 mm focal length lens and no shutter, and electronic flash installed inside clear plastic tube supported at front by plastic wheel; system is propelled at rear by aluminum wheel powered by small reversible battery-operated electric motor.
Self-propelled drainage line camera
Agri Eng
Agricultural Engineering ; 44 , n 9
1963
2 pages
Aufsatz (Zeitschrift)
Englisch
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