在播种的干草中间的具体人孔盖排水系统

在下水道井内

混凝土井盖

PVC管道屋顶排水立管和混凝土井盖在

damaged concrete manhole cover circular reinforced city sewage street

precast concrete manhole segments construction for sewer infrastructure in albania

混凝土井盖

PVC管道屋顶排水落水管和混凝土井盖在

混凝土井盖

PVC管道屋顶排水落水管和混凝土井盖在

首尔市中心人行道上的混凝土井盖

wet concrete manhole cover rests in grassy patch wet concrete manhole cover rests in grassy patch fallen leaves float in shallow

草地上微开的混凝土窨井盖

红色铺砌砖地板上的方形混凝土检查井

混凝土井室段

concrete manhole cover with rusted rebar in grassy roadside verge a broken circular or drain surround sits an overgrown beside

concrete manhole cover on patterned pavement in urban setting with weathered texture

混凝土检修井结构安装在深沟中

concrete manhole cover and pedestrian path with dry grass and green tree in gaborone botswana concrete manhole cover and

concrete manhole cover and shaft receiving bituminous waterproofing treatment for a new septic tank installation septic tank

地下管线和混凝土检修井在挖掘现场

engineer in a red hard hat carefully inspecting an open concrete manhole during network check technical control repair works

two technical specialists inspect an open concrete manhole on a grassy field site utility network audit infrastructure inspection

工人们正在安装一个大型混凝土井盖

地上的混凝土人孔盖

沥青路裂缝混凝土井盖

具体出入孔是underconstruction

冬季被雪覆盖的混凝土井盖

一块覆盖着地衣的混凝土井盖矗立在风景如画的Wuhletal景观公园的Wuhle河岸边

将沟渠排水沟连接到建筑工地上混凝土检修井结构

施工现场地下管道网络的阀井。混凝土井筒和阀室污水泵站

close up of newly installed concrete manhole rings and a metal grate cover positioned beside an asphalt highway shoulder awaiting

concrete manhole construction in urban area with exposed pipe and sand lifestyle concrete manhole construction in urban area with

带地下内排水管部分的公园开口下水道口混凝土井盖

预制混凝土井盖，带穿管连接

绿色草地上有金属盖的旧混凝土井

路面混凝土井盖

在混凝土人孔附近的草坪上，有碎木的屏障

集中于在路的具体人孔盖在水中从

一只双色猫坐在草丛中的混凝土井盖上

两根帆布软管被放入一个带有破损盖子的混凝土井中