| 1. | Where pipelines cross swamps, rivers, or lakes they may be encased in concrete .
油管跨越沼泽地，河流、湖泊时，可以用混凝土管匣套起来。 |
| 2. | Standard specification for porous concrete pipe metric
多孔混凝土管标准规范 |
| 3. | Standard specification for polymer concrete pipe
聚合物混凝土管的标准规范 |
| 4. | Standard specification for perforated concrete pipe
多孔混凝土管标准规范 |
| 5. | Standard specification for perforated concrete pipe metric
多孔混凝土管 |
| 6. | Standard specification for porous concrete pipe
多孔混凝土管标准规范 |
| 7. | Specification for polymer concrete pipe
聚合物混凝土管规范 |
| 8. | Concrete pipes and fittings , unreinforced , steel fibre and reinforced
无钢筋和带钢筋的混凝土管和管配件 |
| 9. | Pretensioned spun concrete piles
先张法预应力混凝土管桩 |
