Double-key unlocking device - LIU XIAOJUN; WEI YIXING; ZHANG ZHOUHAI; FANG SICONG (2025)
Keywords: ACCESSORIES THEREFOR; FIXED CONSTRUCTIONS; HAND CARRIED BAGS; HAND OR TRAVELLING ARTICLES; HANDCUFFS; HUMAN NECESSITIES; KEYS; LOCKS; LUGGAGE; PURSES; SAFES; WINDOW OR DOOR FITTINGS