Spencer, Ellsworth R.
Lightweight fiberglass feed leg for hand held pneumatic percussion rock drills Spencer, Ellsworth R. - Washington Bureau of mines 1985
MINERIA
HERRAMIENTAS DE PERFORACION
622.24.05
Lightweight fiberglass feed leg for hand held pneumatic percussion rock drills Spencer, Ellsworth R. - Washington Bureau of mines 1985
MINERIA
HERRAMIENTAS DE PERFORACION
622.24.05