其第一摆动辊装在第一摆动臂上，第一摆动臂通过带座轴承安装在机座的前上部分；

A first swing roller is arranged on a first swing arm; the first swing arm is arranged at the front upper part of a stand through a bearing with a seat;

youdao

其第一摆动辊装在第一摆动臂上，第一摆动臂通过带座轴承安装在机座的前上部分；

A first swing roller is arranged on a first swing arm; the first swing arm is arranged at the front upper part of a stand through a bearing with a seat;

youdao