单项选择题
A.0.15~0.3MPaB.0.15~0.4MPaC.0.2~0.3MPaD.0.2~0.4MPa
A.瓶线:0.4~0.45MPa;听线:≥0.4MPaB.瓶线:0.4~0.5MPa;听线:≥0.5MPaC.瓶线:0.4~0.6MPa;听线:≥0.6MPaD.瓶线:0.4~0.7MPa;听线:≥0.7MPa
A.0.4~0.6MPaB.0.2~0.6MPaC.0.3~0.6MPaD.0.5~0.6MPa
A.≤5%瓶/hB.≤6%瓶/hC.≤7%瓶/hD.≤8%瓶/h
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