combination lock

type of lock (eg on a safe) that can only be opened by turning a set of dials until they show a particular sequence of numbers or letters 暗码锁（如保险柜上的）.

colourful (US colorful), colouring, colourless, colourless (US colorless), colt, colter, coltish, columbine, Columbus, column, columnist, coma, comatose, comb, combat, combatant, combative, combatively, combativeness, combination, combine, combine with, combined, combining form, combustible, combustion, combustion chamber, come, come about, come across, come across (also come over), come after, come after sb, come alive, come along, come apart, come around, come around (to sth), come at, come at sb,