noun
EXAMPLES FROM CORPUS
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In 1976, thirty-six boxes were returned and are now kept in a strongroom in the archbishop's palace at Padua.
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The robbers opened the strongroom and packed the cash into bags.
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The robbers then used computer key-codes to open the strongroom , and packed the 200 million francs into bags.
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You need to open up a locked strongroom , and to do this you must retrieve some 5 keys.