Regulations require that cargo tanks carrying grades D or E liquids on tank barges be vented with（）.
- Agooseneck vents and flame screens
- Bpressure-vacuum relief valves
- Cbranch vent lines and a vent header
- Dforced draft blower
问题
Regulations require that cargo tanks c
参考解析：
分类：液体散装危险品与IBC规则题库
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