bjsgyq
球墨铸铁件,球墨铸件泊头市精密量具有限公司销售热线：4000-086-046
2013年7月10日 ... 蠕墨铸铁的特点和优点有哪些-齿轮测量显微镜球墨铸铁之应用：球墨铸铁机械 ... 蠕 墨铸铁的优点：强度与延性优于灰铸铁，且能保持灰铸铁之良好导.
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