これマジ状態。
50年以上経過する橋。
サビやコンクリートの腐食、
日本でも本格的に検査が始まり数年。
見えてきたヤバさだが、昨年度の技術誌の発表で良い方向性が出たようだ。
クーレーザですと

65,665
This serious condition.
Bridge over 50 years old.
Corrosion of rust and concrete,
The examination has begun seriously even in Japan and several years.
Although it seems to be visible, it seems that a good direction has come out in the announcement of the technical magazine of last year.
cool laser?

企業のオフィシャルページ
http://coollaser.jp/