DB5329/T 75-2021 Technical specifications for the construction of nitrogen and phosphorus ecological interception ditches for farmland runoff in the Erhai Lake Basin (English Version)
Yunnan Provincial Standard of the People's Republic of China
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DB5329/T 75-2021
DB5329/T 75-2021 history
2021DB5329/T 75-2021 Technical specifications for the construction of nitrogen and phosphorus ecological interception ditches for farmland runoff in the Erhai Lake Basin