CSN OIV 73 6952-1967 Irrigation canals and ditches《灌溉渠道和沟渠》.pdf

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GB T 21303-2007 灌溉渠道系统量水规范.pdf

GB T 21303-2007 灌溉渠道系统量水规范.pdf

GB T 21303-2017 灌溉渠道系统量水规范.pdf

DB64 T 811-2012 《灌溉渠道衬砌工程技术规范》.pdf

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