With the deep tunnel system, the sewer reticulation system in Singapore will, in future, consist of only gravity sewers linked to deep tunnels.
与深隧道系统，污水管网系统，在新加坡，将在不久将来，构成只有重力下水道相连的深层隧道。
With the deep tunnel system, the sewer reticulation system in Singapore will, in future, consist of only gravity sewers linked to deep tunnels.
与深隧道系统，污水管网系统，在新加坡，将在不久将来，构成只有重力下水道相连的深层隧道。
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