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1. |
The mathematical value of down comer backup is? |
A. | h<sub>c</sub> + h<sub>t</sub>+ h<sub>ad</sub> |
B. | h<sub>c</sub> h<sub>t</sub>+ h<sub>ad</sub> |
C. | h<sub>c</sub> h<sub>t</sub> h<sub>ad</sub> |
D. | h<sub>c</sub> + h<sub>t</sub> |
Answer» B. h<sub>c</sub> h<sub>t</sub>+ h<sub>ad</sub> | |