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Apr 1954 - An Eimco model 21 rocker shovel, adapted for dip working, shown at work on a 1 in 4 grade development heading
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Apr 1954 - An Eimco model 21 rocker shovel, adapted for dip working, shown at work on a 1 in 4 grade development heading
(from Mine & Quarry Engineering [April, 1954])
Image Reference: L-00742-03-0065-F10
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