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manhole 人孔,(陰溝的)檢修孔;【鐵路】避孔。

manhood

Dirt trap for manhole covers 人孔蓋的擋渣器

Fibre - cement pipes for sewers and drains - manholes and inspection chambers 下水管和排水道用纖維水泥管.人孔和檢驗井

Fittings , cast iron manhole cover , hardware & building materials 球墨管,生鐵管及配件,陰溝蓋極,鋼管及五金建筑材料

Step irons for staggered manhole steps - part 3 : bolted - on step irons 錯列人孔階梯腳扣.第3部分:螺栓連接的階梯腳扣

Standard test methods for concrete pipe , manhole sections , or tile metric 混凝土管人孔構件或瓦管的標準試驗方法

Manhole closures ; swivel devices 人孔蓋.回轉裝置

Plastics frames for use in gully tops and manhole tops for pedestrian areas 行人區域的水井和人孔頂部用塑料框架

Sanitary fittings , drainage pipes , manholes , sewage water quality , etc 衛生設備、排水渠、沙井、污水質量等

Reuben j . a florin i find him . he fixes the manhole with a resolute stare 一手接著胸骨,深打一躬那是呂便杰。

Manhole covers for sewerage works 污水工程用人孔蓋

Specification for manhole cover assembly , raised , oiltight , and watertight 可提升的防油防水的人孔蓋組件規范

Standard practice for sealing sewer manholes using chemical grouting 用化學灌漿密封污水道檢查孔的標準規程

Standard test methods for concrete pipe , manhole sections , or tile 混凝土管人孔構件或瓦管的標準試驗方法

Why is a manhole cover round 為什么下水道的蓋子是圓形的?

Keep proper length of pipe when put into the manhole 布放后應保留適當長度于引進端人(手)孔或拉箱內。

“ why are manhole covers round ? 為什么下水道的井蓋是圓的?

Handholds for entrance into accessible manholes - requirements , testing 人孔入口處的把手.要求和試驗

“ why are manholes covers round ? 為什么下水道的井蓋是圓的?

Manhole unit for marine auxiliary boiler 船用鋪鍋爐人孔裝置