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Time study analyses :progress report 1 : quarry shovel loading

Time-study analyses :progress report 2 : quarry haulage

Time study analyses.

Churn-drill performance

Published Year

• 1930-1939 (2)
• 1940-1949 (2)

Subject

• Quarries and quarrying--Equipment and supplies--Testing (4) *
• Rock-drills--Testing (1)

Author

• Lintner, E. J. (4)
• Thoenen, J. R. (4) *

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