external treatment
... external screw 阳螺丝 external treatment 厂外处理 extra high bulk book paper 超松厚度书籍纸 ...
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碳酸化处理采用钢铁厂外排的烟道气作为二氧化碳源，减少了温室气体的排放。
The carbonatation processing adopts the flue gas discharged by an iron and steel plant to be used as a carbon dioxide source, so the emission of greenhouse gases is reduced.
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