单项选择题
The rolling hitch could be used to（）.
A.join two lines of different sizes B.join two lines of equal sizes C.add strength to a weak spot in a line D.act as a stopper to transfer a line under strain
单项选择题 The purpose of a devil’s claw is to（）.
单项选择题 The only wire rope termination which may be made in the field is（）.
单项选择题 The main function of the core of a wire rope is to（）.
