| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas leak alarm unit capable of announcing proper correspondence on maintenance to a user at the gas cutoff termination time. SOLUTION: After receiving a gas cutoff signal from a gas meter 3, a gas cutoff termination switch 7 for executing gas cutoff termination of the gas meter serves simultaneously as a message reporting switch, and when the switch is changed to the ON state, a massage on maintenance except a gas leak alarm is reported from an alarm part 5.
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