| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric circuit board in which replaceability of components having short lifetimes among electric components used in the electric circuit board is improved to enable for the other components to be reused to a possible extent. SOLUTION: The electric circuit board, in which a plurality of electric components having a variety of lifetimes are mounted, has a structure in which a plurality of consumable electric components of short lifetimes among the mounted electric components are collected to form a unit, and the collected consumable electric components can be replaced by replacing the unit when the consumable electric components are to be replaced. COPYRIGHT: (C)2005,JPO&NCIPI
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