单项选择题
A.1kPA B.3kPA C.5kPA D.10kPA
A.1300m3/h B.5800m3/h C.8000m3/h D.16000m3/h
A.85℃ B.40℃ C.120℃ D.20℃
A.25m B.16m C.40m D.30m
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