Topping wires fix the height of the derricks and （） to the deck may be used to prevent fore and aft movement.<br>A:stays<br>B:winches<br>C:barrels<br>D:brakes

Topping wires fix the height of the derricks and （） to the deck may be used to prevent fore and aft movement.
A:stays
B:winches
C:barrels
D:brakes

出自：海船船员证

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