| 摘要 |
<P>PROBLEM TO BE SOLVED: To make gas detection possible to be appropriately alarmed to a user. Ž<P>SOLUTION: The gas is sensed, the quantity of the sensed gas is detected, danger alarming is executed responding to the sensed quantity, the input for the danger alarming release for releasing the danger alarming is received, even when the input of the danger alarming release is made from the user, unless the sensed quantity is below a threshold, the danger alarming is controlled to be continued. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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