MCQOPTIONS
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| 1. |
_The included angle for the V-belt is usually$? |
| A. | 10°-20° |
| B. | 30°-40° |
| C. | 40°-60° |
| D. | 60°-80° |
| Answer» C. 40¬¨‚àû-60¬¨‚àû | |