词汇	contra-covariant
释义	contra-covariant 数反共变
随便看	sealing off pump SEALING of gates of barrages or weirs Sealing of Glass to Metal sealing of hole SEALING of mechanical joints in general sealing of metal coating SEALING of packages by heat or pressure sealing of pipes sealing of pipes axial screw SEALING of plastics by heat sealing of records sealing of roller bearings sealing of sliding-contact bearings sealing of soil sealing of tail shaft sealing of the blade sealing of tube sealing of vacuum chamber SEALING of valve spindles sealing of vessel SEALING of windows or doors sealing oil sealing oil parameter sealing oil pressure sealing oil ring system with dual oil flow