单项选择题
A.0.1~0.3B.0.2~0.3C.0.1~0.2D.0.2~0.4
A.局部密闭罩B.整体密闭罩C.小容积密闭罩D.大容积密闭罩
A.多室式B.笼箱式C.集中槽式D.倒焰炉
A.2~3B.1~2C.1~3D.2~4
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