单选题Before welding is permitted on a fuel tank, it must be certified or declared （）Asafe for becoming roundedBsafe for hot workCnot safe for personnelDnot safe for hot work
单选题
Before welding is permitted on a fuel tank, it must be certified or declared （）
A
safe for becoming rounded
B
safe for hot work
C
not safe for personnel
D
not safe for hot work
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