Accidental flooding of the engine room bilges by the bilge main is prevented by （）.<br>A:stop-check valves installed in the bilge manifolds<br>B:using a positive displacement reciprocating bilge pump<br>C:installing eductors in all bilge rose boxes<br>D:installing a swing check before each bilge valve

Accidental flooding of the engine room bilges by the bilge main is prevented by （）.
A:stop-check valves installed in the bilge manifolds
B:using a positive displacement reciprocating bilge pump
C:installing eductors in all bilge rose boxes
D:installing a swing check before each bilge valve

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