循环油润滑
circulating oil lubrication
压力给油润滑法
pressure-feed lubrication
油润滑
wire mill
oil lubrication
lubrication
oil lubri- cation
oil lubricating
oil-lubrication
oil lubricated
lithium grease lubrication
油润滑导轴承
oil lubricated guiding bearing
油润滑的轮轴承
oil lubricated wheel bearing
油润滑简图
oil lubrication schematic
无油润滑涡旋压缩机
non-lubricated scroll compressor
Oil-free scroll compressor
智能干油润滑
intelligent grease lubrication
中国石油润滑油公司
PetroChina Lubricant Company