Regulations require that cargo pumprooms on tank barges (constructed in 1965) carrying grades B or C liquid cargoes have power ventilation systems which can completely change the air in ().

A . 1 minute B . 3 minutes C . 5 minutes D . 10 minute

时间:2022-10-21 03:40:31 所属题库:液体散装危险品与IBC规则题库

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