| http://www.w3.org/ns/prov#value | - ht from above.The water leaks occur in the concrete lining between the tunnel's inner wall and a waterproofing membrane, he said.The lining is comprised mainly of concrete and steel.Yang said that the concrete lining would not collapse, and any deformation or displacement in its structure would only become apparent with long-term monitoring.The tunnel's waterproofing membrane should function as a
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