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1. |
What is the pressure in the vacuum chamber while carrying out oil impregnation of bearings? |
A. | ≈ 1mm H2O |
B. | ≈ 1mm Hg |
C. | ≈ 0.5mm Hg |
D. | ≈ -1mm Hg |
Answer» C. ≈ 0.5mm Hg | |