...uirement 环境质量要求 eco-environmental water requirement 生态环境需水 requirement of environmental protection 环保要求 ..
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It is in keeping with the requirement of environmental protection and economic efficiency to produce impregnating...
认为石油沥青经过改性后制备浸渍剂沥青符合环保和经济性要求。
It is in keeping with the requirement of environmental protection and economic efficiency to produce impregnating pitch from petroleum bitumen modified.
认为石油沥青经过改性后制备浸渍剂沥青符合环保和经济性要求。
Due to the requirement of environmental protection the study of new thermal stabilizer with high efficiency and low or no toxicity become the main subject of the PVC research filed.
随着环境保护要求的提高，高效、无毒热稳定剂的开发和应用成为聚氯乙烯研究的重要内容。
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