The results show that the duplex structure ductile iron is a good abrasive-resistant material.
试验结果表明，这种复相球墨铸铁材质是一种优良的抗磨材料。
The results showed that the passive films possessed duplex structure consisting of an outer hydroxide and an inner oxide.
实验表明，表面钝化膜形成外层为氢氧化物和内层为氧化物的双层结构。
The results showed that the passive films possessed duplex structure consisting of an outer hydroxide and an inner oxide.
实验表明，表面钝化膜形成外层为氢氧化物和内层为氧化物的双层结构。
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