Liquids collecting in the coalescing filter sump are automatically drained into the common drain tank.

凝聚过滤器滤槽中汇集的液体可自动排入共用的排水箱。

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Spring-actuated valve to be used on pump discharge. Swing check with outside lever and spring to be used on sump, sewage and storm drain lines.

弹簧执行机构止回阀用于管道排放。外置操作手柄和弹簧执行机构的旋启式止回阀用于污水坑、排污和雨水排泄管道。

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The system can properly control those pumps to drain the water out by checking water level of sump and other parameters on real time.

该系统通过实时连续检测水仓水位和其它参数，合理调度水泵运行，将矿井涌水排到地面。

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You add in the sump pump, the French drain, the alarm system, the slate roof, the gutters, the generator and you convince yourself that you're safe.

WSJ: Anna Quindlen on a Message Delivered by Tornado | House Call