Double rollers crusher is using a pair of opposite rotating round roll, four roll crusher is to use two opposite rotating round roll for crushing homework.
双辊破碎机是利用一对相向转动的圆辊，四辊破碎机则是利用两对相向转动的圆辊进行破碎作业。
2
The paper set up mechanics model of roll cylinder mill, inquired into crushing stress of materials by mill and materials clamp Angle and energy requirement problems.
In addition, according to the crushing strength and physical, chemical properties of manganese nodule, the testing method for crushing using toothed roll crusher is established.