A feed gear box for a screw cutting lathe is designed on the basis of?

1.	A feed gear box for a screw cutting lathe is designed on the basis of?
A.	Geometric progression
B.	Arithmetic progression
C.	Harmonic progression
D.	None of these
Answer» B. Arithmetic progression

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A feed gear box for a screw cutting lathe is designed on the basis of?

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