| 1. | Practice for hdpe manholes for subsurface applications
地下高密度聚乙烯人孔惯例 |
| 2. | Manhole tops classes a 15 and b 125 , circular ; frames
A15和b125级圆形人孔顶部.框架 |
| 3. | Manhole covers for bunkers and tanks on ships ; seals
船舶贮舱和液槽的人孔盖.密封件 |
| 4. | Railway applications - tank wagons - part 6 : manholes
铁路设施.油罐车.第6部分:人孔 |
| 5. | Manhole tops classes a 15 and b 125 , circular ; summary
A级15和b级125圆形人孔顶部.综述 |
| 6. | Manhole tops classes a 15 and b 125 , circular ; covers
. a级15和b级125圆形人孔的顶部.盖 |
| 7. | Fixed ladders for manholes ; german version en 14396 : 2004
人孔用固定梯子 |
| 8. | Manhole tops , class b 125 - part 3 : covers
. b125级人孔盖.第3部分:井盖 |
| 9. | Manhole tops class b 125 - part 1 : summary
B125级人孔盖.第1部分:综述 |
| 10. | Standard specification for sewer and manhole brick made from clay or shale
污水管和人孔用砖 |
