改善水环境
water environment bettering
改善水质
water quality improvement
改水改厕
drinking water and toilet
Improving lavatories and drinking water
Improving drinking water and lavatories
Safe treatment of night-soil and water supply
Reconstructing water supply and lavatory
RTKGPS动态吃水改正
RTKGPS about the dynamic correction of water line
安全诊断改善技术
safety diagnosis and improvement method
办公室工作改善
improvement of office work
苄基疏水改性淀粉
benzyl hydrophobically modified starch
表面亲水改性
surface hydrophilicity modification
补水改造
supplement water renovation