... sewerage works 污水渠工程 ; 污水收集系统工程 ; 环境保护 storm sewerage 暴雨水下水道工程 foul sewerage 脏水排污设备 ...
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One heavy storm can cause ageing urban sewerage systems to overflow.
ECONOMIST: Infrastructure
He added that sewerage upgrades carried out at pumping stations in 2001 were operating at peak capacity during the storm and that a stand-by pump had also been switched on.
BBC: Promise to act after flood damage
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