单项选择题
A.＜0.07L/h B.＜0.35L/h C.＜0.55L/h D.无漏气现象
A.0.004 B.0.003 C.0.002 D.0.001
A.0.2 B.0.6 C.1 D.1.5
A.1.3~1.8 B.1.2~1.3 C.1.05~1.20 D.0.4-0.7
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