Our products have good seal airtight , low price and flexible rotation , and are thought of be economic and practical .
此类产品密封好、造价低、转动灵活，是一种经济实用型的产品。
2
The spill water handled can be used as slime water in rotation, saving the water resource, reducing the pollution and improving the economic and social benefit remarkably.
处理后的溢流水作为洗煤用水循环使用，节省水力资源，减少了环境污染，经济效益和社会效益显著。
3
Appropriate sowing date helped improve productivity with respect to key inputs, while appropriately delayed crop rotation was awarding to annual economic productivity of rice and wheat.