SL/T 246-2019 Irrigation and drainage engineering technical management regulations has been changed from SL 558-2011 Surface irrigation engineering technical management regulations.
SL/T 246-2019 Irrigation and drainage engineering technical management regulations has been changed from SL 569-2013 Code of practice for technical management of sprinkler project.
SL/T 246-2019 Irrigation and drainage engineering technical management regulations has been changed from SL 599-2013 Engineering technical management code for lined and impermeable canals.
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