海量图书期刊资源,随时随地畅享阅读乐趣
Construction of new rock drillAnonymous, · Eos, Transactions American Geophysical Union · 1989
A New Rock DrillScientific American · 1880
New Hand Power Rock DrillScientific American · 1883
A new type of submerged rock drill, “MD-300PT”Y. Kinoshita; H. Oshika; E. Inoue · 1977
A New Micro-Indicator for Rock DrillASANO, Tomokazu; ASANUMA, Tsuyoshi; TANAKA, Ukichi · Transactions of the Japan Society of Mechanical Engineers · 1951
Development Of New Low-Alloy Steels For Rock Roller Drill BitsR. A. Khrunyk · 2000
A new view of the deterioration and wear of WC/Co cemented carbide rock drill buttonsUlrik Beste; Staffan Jacobson · 2008
The Art of Bacterial WarfareFinlay, B. Brett · Scientific American · 2010
Pre-Columbian Surface MetallurgyLechtman, Heather · Scientific American · 1984
A Revolution in ElectronicsRidenour, Louis N. · Scientific American · 1951
The Lost Cities of PeruSchaedel, Richard P. · Scientific American · 1951
LettersSchaedel, Richard P. · Scientific American · 1951
Science and the CitizenWalford, Lionel A. · Scientific American · 1951
Hybrid CornMangelsdorf, Paul C. · Scientific American · 1951
Heart MuscleMangelsdorf, Paul C. · Scientific American · 1951