BFBa small box used for storing valuable objects, usually kept in a special room in a bank 〔银行里的〕贵重物品存放箱，银行保险箱
Examples from the Corpus
safety-deposit box• Her solicitor had said it might fit a safety-deposit box at the Venetian bank.• The old woman had a safety-deposit box in a bank somewhere, but Zbigniew did not know where.• He kept the film in his safety-deposit box.