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1. |
How much percent of Non-condensable gases are contained in steam? |
A. | 0.5 – 5% |
B. | 10 – 25% |
C. | 75 – 85% |
D. | 50% |
Answer» B. 10 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 25% | |