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The use of portable electrical equipment in the pumproom on tank barges is prohibited unless ______．
A.The pumproom is gas-free
B.Spaces with bulkheads common to the pumproom are either gas-free，inert，filled with water，or contain grade E liquid
C.All other compartments in which flammable vapors and gases may exist are closed and secured
D.All of the above
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更多 “ The use of portable electrical equipment in the pumproom on tank barges is prohibited unless ______．A.The pumproom is gas-freeB.Spaces with bulkheads common to the pumproom are either gas-free，inert，filled with water，or contain grade E liquidC.All other compartments in which flammable vapors and gases may exist are closed and securedD.All of the above ” 相关考题
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