qdgangban
蠕墨铸铁-球墨管知识--青岛球墨铸铁管产品|球墨铸铁管厂家|球墨铸铁 ...
牌号中，“RuT”是“蠕铁”二字汉语拼音的大写字头，为蠕墨铸铁的代号；后面的 ... 的 形态介于片状与球状之间，所以蠕墨铸铁的力学性能介于灰铸铁和球墨铸铁之间，其 ...
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