多项选择题
A.5.0B.5.5C.6.0D.7.0
A.4000Pa~6000Pa,2minB.4000Pa~6000Pa,3minC.3000Pa~5000Pa,3minD.3000Pa~5000Pa,2min
A.10B.20C.25D.30
A.278B.310C.423D.478
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