ON的意思是? 给个整句译文供理解:on the roll,就是作用在辊上。 in order for the hydraulic force on the roll to be exerted on the material being briquetted, there must be sufficient material being compressed between the rolls to force them apart. 为了使作用在辊子上的液压力施加到物料上,必须要有充足的物料压入辊子间,使辊子分离。查看更多