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second-hand materials

强调
一般 бывшие в употреблении строительные материалы (The Orlando tiny house cost less than $1,500 to build, including all the materials, which were sourced second-hand. businessinsider.com ART Vancouver)
技术 вторичное сырьё
second-hand material
聚合物 вторичное сырьё
second-hand materials
: 1 短语, 1 学科
纺织工业1