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C22E structural alloy steel is used for mechanical parts and all kinds of engineering...
C22R structural alloy steel is used for mechanical parts and all kinds of engineering...
C25E structural alloy steel is used for mechanical parts and all kinds of engineering...
C25R structural alloy steel is used for mechanical parts and all kinds of engineering...
C30E structural alloy steel is used for mechanical parts and all kinds of engineering...
C30R structural alloy steel is used for mechanical parts and all kinds of engineering...
C35R structural alloy steel is used for mechanical parts and all kinds of engineering...
C40E structural alloy steel is used for mechanical parts and all kinds of engineering...
C40R structural alloy steel is used for mechanical parts and all kinds of engineering...
C45R structural alloy steel is used for mechanical parts and all kinds of engineering...
C50E structural alloy steel is used for mechanical parts and all kinds of engineering...
C50R structural alloy steel is used for mechanical parts and all kinds of engineering...