Strengthening work of RBC Km 12 ch. 11/260 to 11/560, Km 13 ch 12/000 to 12/360, and RBC Prevent canal leakage Km 14 Chain No. 13/880 to 14/020 as well as to strengthen the observation path at Km 15 Chain No. 15/060 to 15/460 of Right bank canol o
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