Application of SB elements in high-strength ductile iron tile covers
Method and V-method mold for producing ductile iron automobile differential housing by V-method casting
Heat treatment method for turbocharger housings
A kind of coated sand
A heat-resistant steel, turbocharger conjoined shell and its preparation method
A kind of sand core and its preparation method
A turbocharger shell and its preparation method
A method of producing heat-resistant steel automobile exhaust pipe by iron mold sand cladding process