What impact did the machine for crushing stone have in other industries?

It allowed many industries to have easy access to stone, instead of having miners go out and mine, they could just have this machine mine about 9 cubic yards of stone.

the answer is )multiethnic

no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.