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目立たない影の力で事故を未然に防ぐ

8月1日(金)晴れ
 米国で80㌢の水道管が破裂して大洪水になった。台湾の高雄でガス漏れから大爆発が起きた。いずれも地下埋設配管の老朽化による事故。日本では担当職員が歩きながら聴診器を地面に当てて漏れの幽かな音を拾う地道な作業を続けることで事故を未然に防いでいる。

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