片语
unlubricated surface无润滑表面
unlubricated wear金属无润滑磨损
unlubricated friction干摩
unlubricated sliding无润滑滑动
unlubricated bearing无润滑轴承
Unlubricated or lubricated service润滑或润滑服务
unlubricated forward extrusion未润滑正向挤压
unlubricated friction and wear摩擦磨损
unlubricated compressor无油压缩机