单选题Which step is NOT generally taken when gas-freeing a tank?（）.AWashing the tank interior with sea waterBApplication of degreasing solventsCRemoval of corrosion products and sludgeDFresh air ventilation
单选题
Which step is NOT generally taken when gas-freeing a tank?（）.
A
Washing the tank interior with sea water
B
Application of degreasing solvents
C
Removal of corrosion products and sludge
D
Fresh air ventilation
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