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1. |
_The diameter of a cylindrical shell of a Scotch marine boiler varies from$? |
A. | 1.5 to 2 m |
B. | 2.5 to 3.5 m |
C. | 3.5 to 4.5 m |
D. | None of these |
Answer» C. 3.5 to 4.5 m | |