Addition of ____________________ to steel does not help in improving its machinability?

Addition of ____________________ to steel does not help in improving i

1.	Addition of ____________________ to steel does not help in improving its machinability?
A.	Sulphur
B.	Silicon
C.	Lead
D.	Phosphorous
Answer» C. Lead

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Addition of ____________________ to steel does not help in improving its machinability?

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