求翻译：防水工程做完以后，需做闭水试验验收防水质量。方法是封好门口及下水口，在卫生间沉箱蓄满水，并做上记号，24―48小时之间液面若无明显下降，并且楼下住家的房顶没有发生渗漏，即为合格。而对于墙体防水施工的验收，应采取淋水试验，即使用水管在做好防水涂料的墙面上自上而下不间断喷淋3分钟，4小时以后观察墙体的另一侧是否会出现渗透现象，如果无渗透现象即可认为墙面防水施工验收合格。是什么意思？

After waterproof finish, waterproof quality acceptance of closed water test needs to be done. Method is to seal the door and into the water, toilet caissons and storing water, and do, mark, surface between 24-48 hours if there are no noticeable decline, and no leakage occurred in the roof of the downstairs dwelling shall be qualified. And for wall waterproofing construction acceptance, tricking water test should be taken that the use of water pipes in waterproof paint on the walls of sprinkling 3 minutes without interruption from top to bottom, look the other side of the wall is 4 hours after penetration occurs, if there is no infiltration considered wall waterproofing construction acceptance.