2 Gyratory Crushers
At the turn of the century the largest gates crusher, the no. 9, had a receiving opening of 21 x 48 in. with a three-arm spider and a 21 x 80-in. opening with a two-arm spider. the steam shovel began to change the entire picture of open pit quarrying. as a result of the use of steam shovels around 19 10.