Nodular cast iron well lid and preparation method thereof

The invention relates to the technical field of well lids, in particular to a nodular cast iron well lid and a preparation method thereof. Comprising a fixing assembly, a die-casting assembly, a clamping assembly and a cooling assembly, the die-casting assembly comprises a containing disc, a die bot...

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1. Verfasser: YAO YIJIAN
Format: Patent
Sprache:chi ; eng
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