| 摘要 |
A personal alarm system may comprise a plurality of input sensors operative to selective activate a plurality of output devices wherein the output sensors and output devices are contained within a case. The output devices include a locator signal genarator may be operative to emit a locator signal to outside a zone of danger when the personal alarm system is within the zone of danger. The input sensors may be an earthquake sensor, push button switch and/or a modem.
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