【电】 friction-free calibration
naught; nonexistence; not; nothing; without; lack; zero
【医】 a-; leipo-; lipo-; non-
rub; friction; attrition; chafe; grating; grit; scrub
【医】 friction; frottage; rub; rubbing
adjustment; emendation; proofread; rectify; revise
【计】 updating
【化】 correction
【医】 correction