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Subject
Rock-drills (2)
Rocks (2)
Quarrying (1)
Compressors (1)

Creator
U.s. Forest Service (2)
Manning, Max (1)

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 Image: Image Title: Subject: Description/Notes:

1. Rock workers using a jackhammer in drilling at a quarry, near the Coquille River Rock workers using a jackhammer in drilling at a quarry, near the Coquille River Rock-drills; Rocks; Quarrying USFS photo #289013

2. Compressor and jackhammer for drilling rock preparatory to shooting explosives, Lassen National Forest, Compressor and jackhammer for drilling rock preparatory to shooting explosives, Lassen National Forest, California Rock-drills; Rocks; Compressors USFS photo #285485
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