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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单项选择题

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