埼玉県八潮市で発生した道路陥没現場、1月30日総延長約74万キロに及ぶ全国の水道管。 Over 20percentageof water pipes across Japan have exceeded their legal service life of 40 years, but many municipalities are struggling to deal with the matter.
埼玉県八潮市で発生した道路陥没現場、1月30日総延長約74万キロに及ぶ全国の水道管。 Over 20percentageof water pipes across Japan have exceeded their legal service life of 40 years, but many municipalities are struggling to deal with the matter.