·2,447,543篇论文数据，部分数据来源于NoteExpress
A lubricating oil pump shaft and a CAM transmission shaft are respectively sheathed in series in two inner cavities.
两内腔内分别串套机油泵轴和凸轮传动轴。
youdao
应用推荐
模块上移
模块下移
不移动