Fusible-link fire dampers are operated by（）.<br>A:a break-glass and pull-cable system<br>B:electrical controls on the bridge<br>C:a mechanical arm outside the vent duct<br>D:the heat of a fire melting the link

Fusible-link fire dampers are operated by（）.
A:a break-glass and pull-cable system
B:electrical controls on the bridge
C:a mechanical arm outside the vent duct
D:the heat of a fire melting the link

出自：海船船员证

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