Historical outline of progress in road and highway construction in Great Britain; Telford and Macadam pavements; stone breaking with hand hammers; increased demand for road stone and railroad ballast led to activity of inventors; first U S Patent granted in 1830; impact crushers; jaw crushers; gyratory crushers; crusher contest, held in 1883.
Evolution of crusher
Pit Quarry
Pit and Quarry ; 36 , n 11
1944
Aufsatz (Zeitschrift)
Englisch
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