单项选择题
The only wire rope termination which may be made in the field is（）.
A.swaged socket B.thimbled mechanical splice C.hand splice D.spelter poured and resin sockets
单项选择题 The main function of the core of a wire rope is to（）.
单项选择题 Neglecting friction，you desire to lift a 300 kgs weight with a stress on the hauling part of 100 kgs.Which of the following tackles would you use?（）.
单项选择题 Manila slings should not be used to load（）.
