... Surface treatment and other requirement from customer.Standard&certificate:ASTM,BS,NF,DIN,JIS and so on; ISO 9001 ... products can be widely used in the area of cement mill,rotary kiln,shipbuilding,metallurgy,mine,sugar mill,powder ... and so on.We can provide OEM service for cement mill and rotary kiln casting parts,marine steel casting ... obtain a smooth surface. girth gear for cement mill by steel casting