辊组 meaning in Chinese

set of rolls

Design of carrying suspension idlers of belt conveyor
带式输送机承载吊挂托辊组的设计
Principal dimensions of idler sets for belt conveyors for coal mining
煤矿用带式输送机托辊组布置的主要尺寸
Belt conveyors - dimension of structure from idler sets to adjacent component parts - for coal mining
煤矿用带式输送机托辊组与相邻零部件的相关尺寸
Conveyor belts . formula for transition distance on three equal length idler rollers . for coal mining
煤矿用带式输送机滚筒与相邻槽形.托辊组之间的距离计算公式