单项选择题

A stopper used in securing the ground tackle for sea that consists of a grab attached to a turnbuckle is a（）.

A.riding pawl
B.buckler
C.devil's claw
D.locking ring

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单项选择题

A.short splice
B.long splice
C.back splice
D.spindle splice

单项选择题

A.boat fall
B.fairlead
C.riding pawl
D.topping lift

单项选择题

A.block used only with manila rope
B.chock roller
C.hinged block
D.strong block used for short，sharp pulls