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1. |
If the length of a chain line along a slope of θ° is l, the required slope correction is |
A. | 2l cos² θ/2 |
B. | 2l sin² θ/2 |
C. | l tan² θ/2 |
D. | l cos² θ/2. |
Answer» C. l tan² θ/2 | |