球〔状石〕墨铸铁 nodular iron ; nodular graphite cast iron ; nodular cast iron

球[状石]墨铸铁 nodular iron ; spheroidal iron ; spherulitic iron ; nodular graphite cast iron

球状石墨铸铁 Spheroidal Graphite Cast Iron ; [材] nodular graphite cast iron ; nodular cast iron

延性铸铁球状石墨铸铁 ductile cast iron nodular cast iron