| 1. | In drainage of agricultural lands, a filter or gravel envelope is used to prevent the entrance of fine sand and silt into the drains .
在农田排水中常常采用砾石或过滤层来防止粉细砂和泥沙进入排水沟。 |
| 2. | Single wall corrugated plastics pipes for agricultural drainage
农田排水用塑料单壁波纹管 |
| 3. | Technical code for farmland drainage project
农田排水工程技术规范 |
| 4. | Agricultural drainage . corrugated unplasticized pvc pipes . specifications
农田排水.未增塑聚氯乙烯波纹管.规范 |
| 5. | Standard of land drainage test
农田排水试验规范 |
| 6. | Agricultural drainage . corrugated unplasticized pvc pipes . flexibility test
农田排水.未增塑聚氯乙烯圆管.挠性试验 |
| 7. | Agricultural drainage . corrugated unplasticized pvc pipes . impact resistance
农田排水.未增塑聚氯乙烯圆管.耐冲击性 |
| 8. | Agricultural drainage . corrugated unplastificized pvc pipes . bending resistance test
农田排水.未增塑聚氯乙烯圆管.耐弯曲性能试验 |
| 9. | Agricultural drainage . corrugated unplasticized pvc pipes . test for resistance to crushing
农田排水.未增塑聚氯乙烯波纹管.抗压裂试验 |
| 10. | Agricultural drainage . corrugated unplasticized pvc pipes . determination of elongation under load
农田排水.未增塑聚氯乙烯波纹管.负荷伸长率的测定 |
