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目前,为建设西西伯利亚石油天然气综合工程使用二次原料和地方材料,包括用当地砂配制混凝土有着重要意义。生产混凝土所用的外加剂是采用皮革生产
At present, the use of secondary raw materials and local materials for the construction of an integrated oil and gas project in Western Siberia, including the use of local sand for the preparation of concrete, is of great significance. The admixture used to produce concrete is produced using leather