单项选择题
A.keeps the ends from fraying B.strengthens it C.protects your hands D.becomes part of a splice
A whipping is（）.A.a messengerB.a stopper for nylon line...
单项选择题A whipping is（）.
A.a messenger B.a stopper for nylon line C.a U-bolt for securing a cargo whip to the winch drum D.turns of twine around a rope end
A tackle by which the outer end of a boom is raised and...
单项选择题A tackle by which the outer end of a boom is raised and lowered is the topping（）.
A.boom B.lift C.raise D.tackle
A stopper used in securing the ground tackle for sea th...
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
