IMPROVED DRAWING COMPASSES. IMPROVED DRAWING COMPASSES. TOOL FOR WITHDRAWING CASINGS FROM WELLS OIL BURNER. SAW-TOOTH TOOL. A SIMPLE SAW-TOOTH TOOL., scientific american, 1902-11-01
IMPROVED DRAWING COMPASSES. IMPROVED DRAWING COMPASSES. TOOL FOR WITHDRAWING CASINGS FROM WELLS OIL BURNER. SAW-TOOTH TOOL. A SIMPLE SAW-TOOTH TOOL., scientific american, 1902-11-01
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