单项选择题
A.±0.1%B.±0.2%C.0.1%D.0.2%
A.5hB.8hC.11hD.12h
A.装煤点处上风流100mB.装煤点处下风流100mC.装煤点处上风流150mD.装煤点处下风流150m
A.40%~60%B.40%~70%C.50%~60%D.50%~70%
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