| 摘要 |
PROBLEM TO BE SOLVED: To provide a metering device capable of adding functions easily to existing metering devices and making visual inspection to be ease without involving major cost increase. SOLUTION: The metering device, that is equipped with an indicating section 2 metering the electric power usage to display the metered value, a light-emitting diode (LED) 3 illuminating to the indicating section 2, can add easily functions to existing metering devices and making visual inspection to be ease without involving major cost increase. COPYRIGHT: (C)2007,JPO&INPIT
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