1.

The included angle for the V-belt is usually

A. 20° – 30°
B. 30° – 40°
C. 40° – 60°
D. 60° – 80°
Answer» C. 40¬¨¬®‚Äö√†√ª ‚Äö√Ñ√∂‚àö√ë‚àö¬® 60¬¨¬®‚Äö√†√ª


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