多项选择题
A.45% B.50% C.55% D.60%
A.GB/T13477-2002 B.GB/T16777-1997 C.JC674-1997 D.JC/T798-1997
A.0.05MPa B.0.10MPa C.0.15MPa D.0.2MPa
A.24h B.5h C.1h D.0.5h
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