precast-segmental
| sewer
| precast-segmental | |
| tech. | 预制弓形块; 装配式预制的 |
| sewer | |
| ecol. | 化粪池等的排水管 |
| fish.farm. | 排水管 |
| house. | 污水管道 |
| hydroel.st. | 污水管 |
| met. | 下水管; 地沟 |
| oil transp. | 排污管; 下水道 |
| |||
| 预制弓形块; 装配式预制的 | |||
|
precast-segmental : 18 phrases in 3 subjects |
| Bridge construction | 6 |
| Road construction | 1 |
| Technology | 11 |