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Lightweight fiberglass feed leg for hand-held pneumatic percussion rock drills
Effects of selected physical agents on the performance of acoustically absorptive materials
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Published Year
1980-1989 (1)
1990-1999 (1)
Subject
Acoustical materials--Testing (1)
Boring--Equipment and supplies (1)
Mineral industries--Environmental aspects (1)
Rock-drills (1)
Author
Spencer, Ellsworth R. (2) *
Burks, J. Alton. (1)
Ruhe, Thomas C. (1)