单项选择题
Stuffer-braid rope has（）.
A.a yarn core
B.no core
C.three strands
D.12 threads
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相关考题
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单项选择题
Serving is（）.
A.marline or ratline wound along the grooves of a rope
B.narrow strips of light canvas or cotton cloth spiral-wrapped along the rope
C.marline tightly wound on the rope by means of a board or mallet
D.a splice made by laying the strand of one rope into the vacated grooves of another rope -
单项选择题
Separating both blocks of a tackle to prepare it for reuse is called（）.
A.chockablocking
B.fleeting
C.overhauling
D.two blocking -
单项选择题
opes or wires attached to derricks to prevent them from swinging during cargo handling operations are（）.
A.Preventers
B.Side ropes
C.Stays
D.Guide lines
