短語(yǔ)詞組短語(yǔ)tetra substitution product 四取代産物Non -product Substitution 無(wú)産品替代backward product substitution 後曏産品替代irreversible product substitution 不可逆産品替代optimal condition of product substitution [計(jì)劃]最佳生産代用條件product of substitution 取代産物multi -product with substitution 多産品替代 返回 substitution product