单词	Mainta/nance
释义	Mainta/nance 保养
随便看	spiral seam pipe spiral seam tube spiral search spiral sector spiral-sector spiral-sector accelerator spiral sedimentation centrifugal machine spiral seed separator spiral segment spiral separator spiral septulum spiral septum spiral sequencing spiral servo track writing spiral shaft spiral shaft dotting machine spiral-shaft dotting machine spiral shafted implant spiral-shafted implant spiral shank tap Spiral shape Spiral shaped spiral-shaped spiral shaped agitator spiral-shaped agitator