单项选择题
A.1200 B.1000 C.800 D.600
A.9.5%~9.8% B.11%~13% C.15%~16% D.20%~30%
A.27% B.37% C.47% D.57%
A.锅炉给水泵 B.补充锅炉水泵 C.锅炉水循环泵 D.工艺水泵
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