n.
an unforeseen obstacle
同义词：hang-uphitchsnag
the act of rubbing or wiping
"he gave the hood a quick rub"
同义词：wipe
Electronic rubbed copy imaging system
The effect of rubbed polymer films on the liquid crystal alignment
Near-surface alignment of polymers in rubbed films
Microscopic Origin of Liquid Crystal Alignment on Rubbed Polymer Surfaces
Sum-Frequency Vibrational Spectroscopic Study of a Rubbed Polymer Surface
Orientation of Polymer Molecules in Rubbed Alignment Layer and Surface Anchoring of Liquid Crystals
Determination of molecular orientation of very thin rubbed and unrubbed polyimide films
Reflection anisotropy spectroscopy: A probe of rubbed polyimide liquid crystal alignment layers
Nonlinear optical studies of liquid crystal alignment on a rubbed polyvinyl alcohol surface
Study of the pretilt angle for 5CB on rubbed polyimide films containing trifluoromethyl moiety and analysis of the surface atomic co...
