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Burglar alarm: burglar alarm
Note Burglar means thief.
alarm has the meaning of alarm bell, alarm, etc.
burglar alarm is a fixed match, which means the automatic alarm bell of anti-theft.
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The alarm and 110 linkage are slightly more expensive.
The anti-theft doors and windows are strong, and the national standard seems to be that they cannot be opened violently within 15 minutes. >>>More