| 摘要 |
An alarm clock has associated with it an alarm and a snow-sensing means for detecting an accumulation of snow. The clock is provided with means for setting an alarm at two individually presettable times, one of which is set for normal waking and the other set in advance of the first to alert the sleeping user at a time earlier than the preset normal wakeup time when there has been an accumulation of snow while he slept.
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