共きょう同どう溝こう

noun

multipurpose underground utility conduit; common utility duct

Civil engineering term for an underground tunnel housing multiple utilities such as water, gas, electricity, and telecommunications lines.

• 共きょう同どう溝こうは都と市しのライフラインを守まもる重じゅう要ような施し設せつです。

  Common utility ducts are important facilities that protect urban lifelines.

• 新あたらしい共きょう同どう