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| 1 | project for preservation of raw water quality used in city water systems | 水道原水水質保全事業 | |||
| 2 | Law concerning the Promotion of Projects to Preserve Water Quality in Drinking Water | 水道原水水質保全事業の実施の促進に関する法律 | |||
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|---|---|---|---|---|---|
| 1 | project for preservation of raw water quality used in city water systems | 水道原水水質保全事業 | |||
| 2 | Law concerning the Promotion of Projects to Preserve Water Quality in Drinking Water | 水道原水水質保全事業の実施の促進に関する法律 | |||
