25

2022

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02

Our company has obtained the invention patent of ductile casting and ductile iron piston and its casting process.


On September 24, 2014, he obtained the invention patent of ductile casting and ductile iron piston and its casting process.

On October 31, 2012, he obtained an invention patent for ductile iron and ductile iron piston and its casting process, certificate No. 1488023.