这几个铸造厂在减少新砂购买和旧砂弃置费用方面前进一大步，并保证排放物低于规定。
They took a major step forward in reducing new sand and disposal costs, provided emissions well below regulations.
这几个铸造厂在减少新砂购买和旧砂弃置费用方面前进一大步，并保证排放物低于规定。
They took a major step forward in reducing new sand and disposal costs, provided emissions well below regulations.
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