| 摘要 |
PROBLEM TO BE SOLVED: To provide a crime prevention switch set up so as to sound an alarm when the switch falls down. SOLUTION: Gold cans 1, 2 are arranged in a casing 3 so as to be vertically separated from each other and connected to codes 4 and gold dust is arranged in space surrounded by the gold cans 1, 2 so as not to be brought into contact with the cans 1, 2.
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