船用端部密封式气密滑动门
marine end-sealed airtight-sliding door
全密封自动润滑轴承
fully sealed & self-lubricated bearing
主动小齿轮润滑油酚醛密封件的安装
input pinion phenolic oil seal installation
主动轴润滑脂密封挡圈
drive shaft grease seal retainer
磁驱动滑动弧放电
Glide arc driven by magnetic field
固体润滑滑动轴承
bearing with solid lubricant
精密滑动式切片机
precision sliding microtome