Spring Roller Bearings 螺旋套圈轴承

spring-loaded roller 弹起轮

Roller Spring Assistance 钢铁制弹簧卷帘助力器

spring-mounted roller conveyor 弹簧支承滚轴运输机

roller whip spring 双圆盘制动杆簧

spring carrier roller 弹簧托辊

spring supporting roller 弹簧托辊

spring-type roller mill 弹力辊磨机

spring-loaded roller mill 弹簧加压辊磨