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来源：雅诚德英语网
Popularize common materials for mature ditch anti-seepage projects such as concrete, bituminous concrete and plastic film.
推广使用混凝土和沥青混凝土、塑料薄膜等成熟的渠道防渗工程常用材料；
Popularize common materials for mature ditch anti-seepage projects such as concrete, bituminous concrete and plastic film.
推广使用混凝土和沥青混凝土、塑料薄膜等成熟的渠道防渗工程常用材料；